October 19, 2010
Choose your trails carefully and you're in for a great ride. Bring a trail map that described trail difficulties or you'll regret it. I highly recommend this trail guide: http://docs.google.com/gview?embedded=true&url=http://www.departments.bucknell.edu/geography/environs/bike_guide.pdf
Cowbell hollow is definitely one of the best singletracks around. If you hit RB Winter, you're obligated to hit Cowbell. No questions asked. It's got a nice balance between excellent stony descents, steep climbs, and a few small obstacles to boot. The other trails marked as "medium" are pretty enjoyable as well.
Trails marked as "advanced" or "very rocky" are not exaggerated by any stretch. Some trails are downright impossible to traverse without walking through at least a few sections. Of course, I did it all on a hardtail, so I can't offer the best insight on this - some of the harder trails might be doable with a FS bike (i.e. Top Mountain Trail).
Speaking of Top Mountain Trail, the view is fantastic if you make it to the top. Don't miss that vista at the peak or you'll regret it. It makes the near-impossible rocky climb worth it. The Bucknell guide says that it's a "unique trail for all levels", but beginners/experienced riders alike should be prepared to do a lot of walking unless they're well-equipped. I probably carried my hardtail over a mile and a half of really extensive rock gardens. Hope you can bunny hop, too, because there's lots of downed trees that have been incorporated into the trail. After a steep technical descent, the trail ends with a 2 or 3 foot ridge that one can easily get some nice air off of, assuming enough speed is acquired from the someone difficult descent. You AMers will love that part.
If you want to hit that jump, be sure to go from east to west. You'll be fighting extensive rock gardens all the way up, but you'll have a pretty nice descent on the way back.
Also note: Glen Cabin Trail looked way overgrown and under-ridden at a glance, though I didn't go down it.