|   Rate it:

Level: Advanced
Length: 5 mi (8 km)
Surface: Singletrack
Configuration: Out & Back
Elevation: -
Total: 2 riders

Mountain Biking Tres Marias

****   Add a review
#1 of 3 mountain bike trails in Argentina
#7,810 in the world

Tres Marias is a shared hiking and biking trail that starts at the parking
area at the bottom of the mountain (where the outdoor cafe and artesians
are located). The east side trails are mainly used by hikers, but the trails
go around the mountain adjacent to route 60 and up to the top of Tres
Marias. If you climb, be prepared for some hike-a-bike sections (as much as
5-10 min) but the trails at the top are smooth and easy...though there are
a few spots with a lot of exposure.

First added by Michael Paul on Jul 23, 2012. Last updated Apr 28, 2020. → add an update
Before you go
  • Drinking water: unknown
  • Lift service: unknown
  • Night riding: unknown
  • Pump track: unknown
  • Restrooms: unknown
  • Fat bike grooming: unknown
  • E-bikes allowed: unknown
  • Fee required: unknown
This trail information is user-generated. Help improve this information by suggesting a correction.
Getting there
Take Route 60 North from the city of San Juan towards the Ullum Dam and
look for the parking lot on the east side right before you cross the dam. There
are actually a net work of trails on both sides of the dam, but the ones on the
west side are mostly used by motocross and are sandy and washed out.
I Rode It!   Add to another list

Tres Marias Trail map

We don't have a location for this trailhead yet. Help us get it on the map.

Local Info

Club Sponsor


Local Bike Shop


Trail checkins

Upcoming Events

Add one

Trail conditions

Wet (on Feb 6, 2013)
login to update

Camping & Lodging

Coming soon!

Tres Marias videos

Add a video
We don't have any videos of this trail yet. Add one here.

Rider questions

Add a review



  • Michael Paul

    The main trailhead is on the east side of Ullum dam. There are trails going all over the place, and it is easy to get lost if you don't keep track of where you come from. Most trails are built for and by hikers, but there are armored rock sections, small jumps, and evidence of mountain bike use everywhere. The trail to the top of Tres Marias mountains is steep; you will have to dismount, put your bike on your shoulders, and walk up steep switchbacks for 5-7 minutes. The climb is worth it. Once at the top of the switchbacks, most everything can be ridden with ease, as the trail is well used and maintained. From the summit you can follow the ridge south, and if you keep an eye on route 60 to the west then you can find one of many trails down that will parallel the road and go back to the trailhead. On route 60 you will undoubtedly encounter a plethora of cyclists. Note this area is very remote in some places. Also of note, there are some seriously gnarly places for carving your own DH lines (especially on the west side of the dam), especially if you have a long travel bike and brass huevos.

    Reply | Thank