Review: Great ride, use the shuttle if possible. That said I think the trail is way overrated by people that don't MTN bike that much (no offense). A large portion of the trail is a very loose rocky road, with some good jumps/drops. The single track has some really great technical portions but doesn't offer too much area for speed. I recommend doing the trail because I love technical riding but I would look into some rides in Colorado as well if you want to see some 5 star riding.

Review: No doubt, this is a great trail. I did it for the first time in 1995, and there were no shuttles so we rode up from our campsite on the Colorado river--take the shuttle or have 2 cars, trust me, it's worth it. Almost completely unmarked back then, hard to follow, and we DID get lost and spent a night on the trail as punishment; some guys died the next year when they got lost and didn't stay put in the dark. But don't let the other reviews scare you--we did it on hard-tails back then, and elastomer-sprung forks. Be careful, ride within your limit, but it's a must-do trail. It's MUCH better marked now, but it's still always smart to bring a headlamp or matches--fires aren't allowed there, and an overhead plane will spot you if you're stuck. Wish we had thought of that in '95!!

Review: *edit* accidental double-post

Review: Most of this trail is jeep doubletrack but that doesn't mean its easier because its wider. Very challenging extended rock features to climb and descend. I found the most important factor in successfully negotiating the many obstacles is route selection as there are many lines through most sections. Views are awe inspiring as you climb above town and the Castle Valley and descend toward Negro Bill Trailhead. The last 3 miles or so are off limits to motorized vehicles and constitute the only true singletrack on the route. But, oh what singletrack it is as you descend on the thin tread in steep valleys while negotiating difficult rock outcroppings, one after another. No room for error here so use extreme caution.

* Review edited 10/23/2012

Review: In the category of epic. If you go to Moab and don't ride this, you will regret it. The trail is, however, pretty chopped up. There are a lot of loose rocks and some pretty hairy technical spots. But, don't let that keep you from this trail. Tip... try to hit it on a week day. I've seen 30 or more riders on weekends backed up on some of the technical sections.

Similar Trail: Slick Rock

Review: Great ride on some bumpy terrain- very technical at the bottom- a fair amount of hike-a-bike in the last few miles. Great views along the rim.

Similar Trail: Amassaback

Review: What a fun ride! Amazing views, crazy gnar, tons of drops... the only thing is this isn't really singletrack. The choose-your-own-adventure approach is fun at times, but then it gets kind of old. The sandy sections are pretty unfortunate too.

Review: Great trail! Very challenging but a lot of fun.

Review: Probably the best trail I've ever ridden. It's got everything you want - screaming downhills, gnarly technical riding, drops galore, minimal climbing (that's a good thing), cliff-side riding, unreal views. If you're in Moab, do it up. And bring a nice beefy bike to do it, no less than 5"

Review: This is simply a must do for any serious mtn biker. Fun, fast, tough, and awesome.

Review: An epic ride, one of the best around Moab. The views are worth the ride up, and the technical sections are very challenging in places.

Similar Trail: Sedona Area trails

Review: Epic Loop or super sweet shuttle. Be sure an add UPS and LPS for a ride that has everything. The views are stunning and there are great technical challenges all along the way. One of the best rides out there.

Similar Trail: Sovereign Singletrack, Phil's World, Monarch Crest

Review: Almost 20 miles of sweet challenging singletrack with a minimum of pedalling. But still it squeezed all my energy out. I did it with a shuttle from the very top (Whole Enchelada) and had a best riding in my life. This trail really teach how to ride a bike. And let's not forget about great views while riding. I'd recommend to have a seat-drop for this trail - makes it more fun and much easier.

Review: I parked at the watertanks and rode to the overlook about 3-4 miles. Then turned around and rode sweet downhill back to the car. About 1.5 hours for that. I needed a little more riding after Slickrock.

Review: This is my favorite trail ever. If you like technical riding then you will love this trail. I would recommend shuttling up so that you have all your energy and focus for the crazy stuff you're about to see. There are plenty of photo ops near the top that look over the entire region so you may want to stop and drink it in. Coming down from the top you will be challenged no matter your skill level as there is some gnarly stuff on this trail. Lean back and have fun!

Similar Trail: Dakota Ridge, Hartman Rocks

Review: Quintessential Moab experience...Ride as a shuttle or loop. Breathtaking views with breathtaking climbs initially and downhilling ...

Similar Trail: Amassa Back

Review: The trail by which all other downhill singletrack must be measured...nuff said, except that this trail IS a lot more fun on a 5-6 inch travel bike!

Review: A Moab must do. If you come to Moab and skip Porcupine Rim you should have stayed home.

Review: Moab favorite. Rode it on a 100mm Turner and had no trouble with the drops, other than the mental aspect. Bring a camera. Stay on the trail, some have died here getting lost. Views are sweet the climb not very tough. Have a good break at the top, suck down some calories and have at the fun descent. Dirt bikes ride here, too.

* Review edited 5/11/2011

Similar Trail: Soverign, Bartlett Wash, Milagrosa Trail

Review: Trail is a humbling downhill ride of epic proportions. I've never rode anything like it. I recommend the shuttle all the way to the top and take plenty of water. I blew two tires, broke a wrist, knocked loose a casing, and had a blast. Parts of this trail will straight humble you. I recommend it the second day in Moab - do a warm-up trail before biting into this one.

Similar Trail: Nothing like this

Review: Fantastic ride. Take a shuttle to the trail head, unless you like to ride on dirt roads for miles on end.

Review: The Snotch re-route on LPS is now signed and easy to find. This is a much tamer and sustainable alternative to the Notch, which is still accessible.

Similar Trail: Amasa Back

Review: One of the greatest rides ever! I would put it above Slickrock for sure. Nice climb leading to never ending downhill that was fast in some spots and pretty technical in others. Great scenery and worth going to Moab for!

Review: One of the best rides I have done. The climb is killer, with a lot of sand and rocks to navigate, but knowing it is only ~3 miles gets you to the top. Then the fun begins (unless you're into hellish climbs). The views are amazing, and you the downhill will try to rattle your bike to pieces. And make sure you save some strength for the downhill, because you will definitely need it. Highly recommended.

* Review edited 6/6/2010

Similar Trail: Not much else like it.

Review: UPS and LPS are officially legal, and what a riot! They are also part of the Whole Enchilada but the upper section of that ride is pretty much closed for the year now. If you shuttle up Sand Flats Road to Porcupine Rim Trailhead, it's well worth the extra 1/2 hr to keep driving up to the LaSal Loop Road (Kokopelli Trail). UPS and LPS are sweet singletrack with a wide variety of terrain and massive cliff views into Castle Valley and up to the LaSals. LPS drops you out right at the first Porcupine Rim viewspot. Combine UPS, LPS and Porcupine Rim for LONG ride all the way to the river. Epic. Give yourself all day to complete and LOTS of water.

Similar Trail: Not another like this one! Shorter awesome rides include Porcupine Rim, Amasa Back and Flat Pass.

Review: The most intense trail I've done... and I was silly enough to do it on a hard tail. Great scenery, incredible downhill!

Review: Did the trail for the first time in Sept 2009. It did not disappoint. Every 1000 feet we dropped in altitude was like riding an entirely different type of terrain. The ride was everything we could have asked for - all types of terrain, lots of different lines and you could make it a technical as you wanted or as insanely fast as you could manage.

Similar Trail: We rode Slickrock the day before and this too would be high on my list!

Review: Porcupine Rim is by far the most EPIC trail i've ever unicycled. i attended the moab mountain unicycling festival this march, and was blown away by the caliber and finesse this trail had to offer. i walked away feeling like a champion, and so should you... wear those pads!

Review: A desert classic! Must do. Not for everyone due to rider ability. A tough demanding trail that can bite you at any time. Awesome views and a ripfest downhill.

Similar Trail: Amasa Back

Review: If you start from the normal, shuttle trailhead, the 3 mile climb is not that bad. And I am NOT a good climber. Also don't forget to catch some air for the photographer on the berm by the road!

Review: I've ridden this trail once in a blue moon for about 15 years and it's always epic, always special - one of my top 5 favorites of all-time. It's everything everyone says it is and then some - to give less than 5 stars is heresy. Start and end in town, skip the shuttle. It's not as bad as you might be led to believe and the 3.2 Utah beers go down a bit easier when you're done.

Similar Trail: Something in the desert with many miles, crazy scenery and technical madness.

Review: amazing

Review: Of all the trails I've ridden in the US, this is my favorite. After the climb and a pause at the top, it's a mtb'ers dream ride back down with flowing singletrack, optional jumps and spectacular views. Watch the edge.

Review: Finally got to do this ride. We started at 8000 ft. in the aspen groves of the La Sal Mountains rode UPS and LPS over 30 miles in all! It’s a fairly brutal ride A little overrated but a great ride. Take the Poison Spider Shuttle to the top for a few extra bucks it’s worth it.

Review: I can't really add much to this trail other than to recommend paying the extra $5 to have Moab Cyclery drive you the extra few miles up the rim so that you start the trail going downhill. This takes out the 3 mile climb you get with the "normal" Porcupine Rim loop. Awesome trail, and next time we are going to go even further up on the shuttle.

Review: This is possibly the best ride in the world. The stiff, technical, three mile climb to the rim is awesome. Once on top of the ridge, you're treated to some of the best scenery Moab has to offer. Top it all off with the best singletrack descent you'll ever see. I could do this one a gazillion times and never tire of it. 5 stars is not enough--there are no words to prepare you for the sheer brilliance of this ride!

Review: Porcupine Rim is just a perfect ride with lots of everything that is good in the world. I rode this most recently in Late May 07 with some pro riders that were kind enough to wait for me and I had an awesome experience. We actually started on the upper Porcupine entrance which is a VERY LONG SHUTTLE RIDE in the Coyote Express military troop transport that looks like some sort of overgrown escaped science project. The ride up the shuttle with 18 other riders was an experience in itself as everyone on the right side of the bus (troop transport) would shriek and pray every time the bus got close to the edge of the cliff for two hours the view kept our adrenaline pumping. After we all regained our senses near the top of Lasalle Pass we started the epic downhill sigletrack that may or may not be open to the public anymore. This is an awe inspiring ride that was clearly made simply for mountain biking enjoyment and no other reason. I got the feeling several times that I might have been trespassing as I helped or watched our leader move no fewer than 20 log barriers that had apparently just been installed the night before. But he assured us all that he had a permit... What came next was an awesome tightly wound single-track through the scrub on the cliffs edge above the typical half-way point and photo opp on the normal Porcupine Route. Packed with tight lines, super steep descents and some moderate drops. Upper Porcupine is awesome! Then just about when I though I couldn't descend anymore we hit the lower Purcupine and got onto the wide open blistering fast porcupine descent. Super fast and furious! Big air, spinning out in our big rings, and riding in a big group made this super epic experience. We had a bunch of snake bitten tires which suited me just fine so I could let my triceps rest as various riders replaced their tubes. Once while waiting for a tire changer i actually saw a very rare "shirtless biker" who we all quietly made fun of-- then watched him ride off a 30" drop without even slowing down or looking back to see if we noticed! There are some crazy technical sections with giant drops and gap jumps but all of it is optional with easy ride-arounds. Likewise, a little bit of exposure near the very bottom but it's all good as long as you're going fast enough to have to concentrate on the trail and not the consequences!

Review: Sweet trail love it cant beat it

Review: Best trail I have ever ridden! This trail made me a better rider because you get going so fast on the DH that you don't have time to not negotiate technical drops, turns, obstacles etc, you just take it! This is a great trail to see what youíre bike can do. I have decided to make it one of my pilgrimages each year.

Review: This was an amzing trail. I was only able to ride some of it because some people inour group weren't ready for the down hill. We went to where the trail turns away from the rim. The climb was fun and techy, great to test your skills on. The downhill, even though it wasn't the official downhill, it was great, alot of fun and all of the clifs were fun to hop.

Review: Simply a great downhill with good opportunities for drops, etc. with views to boot. Good variety!

Review: I rode this trail during a road trip while living in Montana. Camped in the campground in moab which has the dirt road leading to the main climb for Porcupine rim. We rode Poison spider the first day, Porcupine rim the second day and Slick rock the third day then we went to Durango (was a nice road trip). This was in April of 1995. I was on a hard tail of course with a total of 2 inches fron suspension, but even then, It was the best trail I've ever ridden and still, I think it is the best trail I've ever ridden. We made it an epic. Left the camp ground on our bikes that morning, and made a 30 something mile loop of it with the last few miles on the road, mostly uphill back to the tent. I think I better go dig up my old photos, yes we took a few pictures. The view from the top was sweet, actually the scenery thruogout the ride was awesome. I can't wait to go take my wife and kids out there and let them ride (my sons have a few more years before they could handle the likes).

Similar Trail: Poison Spider, Some Loop we rode in Big Sky that went from "the Canyon", up to Andesite mt and the back down into "the meadow, i forget the name of the trail(s), much of it might not even exist due to the growth around there.

Review: If you like fast technical downhills, look no further!!! I don't think I will ever ride another trail like this. Awesome scenery, fantastic terrain, and the last 3 miles send you into sensory overload. I LOVE this trail. If I were stranded on a island with only one trail to ride, THIS WOULD BE THE ONE!!! Can I rate it higher than 10?

Similar Trail: Not much else compares.

Review: First time I rode this trail was on a hardtail and I paid for it. I went back and rode it again. This is a great ride one of the best around Moab but do it off season to avoid the crowds. The downhill is phenomenal just keep your eyes on the trail and not the bottom of the canyon next to it.

Review: This is the #1 must-ride in Moab. Fantastic views; fun downhill that you wish would go on forever. I recommend that you be pretty comfortable doing singletrack before taking it on. I have seen all skill levels on this trail, and I have seen a lot of people get hurt. You can come around some high speed turns only to be presented with a rock garden with drop-offs, so keep your eyes open. And yes, there are some cliff areas in the lower section that make it wise to pay attention. Unless you like to do miles of grunting uphill take a shuttle. If you don't have the cars to do it yourself, or don't like the hassle, look into the local shuttles. They typically pick up at the major bike shops in town once an hour in the morning. Ask the shops for details. If you do your own shuttle don't forget to bring your receipt from the gate on your ride down so that you don't have to pay again bringing the other car up to the top.

Review: I'm new to mountain biking, but still had a lot of fun on this trail, regardless of having to walk a lot. My friends were much more experienced than me, and had niced bikes/equipment. But a word of caution if you don't have much experience: be careful!! When I should've been walking my bike, I actually fell off a 15 foot ridge (cliff) on this trail, and scared the c*** out of my friend behind me, my husband who was in front of me, and of course, myself! I luckily missed the big boulder beneath where I fell and landed in dirt and weeds, and came out with afew bruises and scrapes.

Review: One of the big three in Moab I would recommend, the other two being Slick Rock and Poison Spider

Review: sick trail, just totally sick

Review: A great trail with a long climb starting from downtown Moab and some great views of the Colorado river. Some sections are rough - better on a full suspension bike.

Review: Porcupine Rim is by far the best trail I have ever ridden. We had 2 cars. We parked one car at the public park in town and used the other car to shuttle people to the trail head. This trail starts with a 4 mile climb that has some challenging areas, but nothing to impossible. The Jeeps, Hummers, and Toyotas got in the way on the uphill climb and we had to pass them, but never did see them again. The down hill is the best. There are usually multiple lines through technical sections, so you should be able to pick the line that meets your skill level, even if it means you need to dismount. We hade 6 people in our group and many of them had to dismount to make many of the technical sections. I saw everyone from the beginner to the pro on this trail. As long as you take you time you should be able to make. I did notice a group of people with no water or helmets, which were the beginners, I donít recommend this. Make sure you drink plenty of water, I cramped-up very badly on the road back to Moab. Also make sure you wear a helmet, one of the individuals in our group cracked a rib. The last few miles is through j*** a** canyon, this is a place where you do not want to mess up. With 100 foot drop-offs you can die easily if you do not stay on the trail. This is a very technical trail and at 14 miles from trail head to road it isnít short. I donít know how fun this will be for a beginner since they will need to dismount many times and may need to escort the bike up hill. Klondike Bluffs is a great trail for beginners.

Review: This trail is one of the best point to point or massive loop trails of all time. Very rocky downhill which is riot to bomb. Awesome views. Potential for a serious fall of a canyon wall if you are day dreaming. Great trail!!!! Bring water and a tools any repair. My trip generated a pinch flat and my buddy broke a chain. thank god for chain tools.

Review: This ride is way cool. For inexperianced riders don't be discourged, i had a kid who had riden a bike like 2 times and was a little over weight do this trail w/ me and he loved it. So any one can do this SWEET ride.

Similar Trail: Poison Spider(Moab)

Review: This is a classic ride! For the sick-minded out there, try starting this ride from a camp spot on Sand Flats Road, and finish with the climb from the town of Moab back up the Sand Flats Road. For those that aren't into that, try this popular option: shuttle to the trail head off Sand Flats Road, so you don't have to eat dust form passing traffic, then catch a ride at the highway to Eddie McStiffs for drink and food. The admirable mid-point is to burn 'em up on the highway back to town to earn your Eddie McStiffs. Of course, I have known many rides to end with a hike down the canon to catch a ride to town due to unexpected broken bike syndrome. If that happens to you, don't feal bad, you've earned your Rassy Wheat Beer for sure.

Similar Trail: Poison Spider (Moab, UT)

Review: This was by far the besr trail I have ever ridden.It is not the most techy trail out there.What I liked about the trail was that it was mostly rideable.There are plenty of spots to take either a 2 foot drop or a 4 or an 8 all in the same spot.the best,the best! what else can i say,go there if your an experienced mountain biker.

Similar Trail: Part of the Centennial trail in South Dakota (elk creek th. to Alkali Creek th).12 miles with similar fun factor.