![Jazz Chromoly Were bombing south down a ridgeline trail in white clay, headed toward the deep ...](http://cdn1.utahmountainbiking.com/trails/images/pics-trails/Jass06.jpg)
This is a fun dirt singletrack located near Red Fleet Reservoir north of Vernal, part of the Red Fleet trail system . Ridden as described below, it's 6.5 miles. Lowest elevation is 5700 feet. While there's only 300 feet of absolute elevation change, up-and-down riding will make your climbing about 800 vertical.
![Typical trail segment in the red dirt, weaving through juniper and sage. Typical trail segment in the red dirt, weaving through juniper and sage.](http://cdn1.utahmountainbiking.com/trails/images/pics-trails/Jass02.jpg)
![Cattle watering trough, served by the small pipe you see here. You visit this tr... Cattle watering trough, served by the small pipe you see here. You visit this tr...](http://cdn1.utahmountainbiking.com/trails/images/pics-trails/Jass09.jpg)
![At the top of the ride, were about to plunge steeply between these junipers, the... At the top of the ride, were about to plunge steeply between these junipers, the...](http://cdn1.utahmountainbiking.com/trails/images/pics-trails/Jass04.jpg)
![Kowabunga! And ride em cowboy! Fly on down. This is fun stuff. Kowabunga! And ride em cowboy! Fly on down. This is fun stuff.](http://cdn1.utahmountainbiking.com/trails/images/pics-trails/Jass08.jpg)
0.0 Ride west from parking N40 35.923 W109 27.470
0.5 Through dip and north along 191
0.8 Pass return route, keep L N40 35.952 W109 27.899
0.9 Veer R uphill as you reach white clay N40 36.059 W109 27.920
1.2 Trail turns south (R) at trough N40 36.203 W109 27.689
1.4 Fork hard L uphill (R=return) N40 36.033 W109 27.728
1.5 Fork L N40 36.094 W109 27.626
2.2 Trough, keep L uphill along pipe N40 36.550 W109 27.397
2.5 Reach fence, go east
3.0 Trail weaves, keep along fence N40 36.765 W109 27.103
3.2 Fork R (south) downhill N40 36.784 W109 26.862
3.9 Hard R at bottom of hill N40 36.248 W109 26.708
4.3 Keep R and R (L=to road) N40 36.227 W109 27.015
4.5 Cross doubletrack N40 36.355 W109 27.184
4.8 Back at trough, fork L downhill N40 36.550 W109 27.397
5.4 Rejoin outgoing trail, keep straight N40 36.094 W109 27.626
5.5 Keep straight downhill N40 36.033 W109 27.728
5.7 At outgoing trail, fork L N40 35.952 W109 27.899
6.5 Back at car
In Vernal on US-40 (the main drag), turn north on US-191. Drive to mile 10.7 and turn right at the paved road signed "Red Fleet Dinosaur Trackway." Drive uphill 0.6 miles. At the top of the hill, turn left onto a dirt road and immediately park in the wide area on the left. The trail starts on the west side of the parking area (left as you pulled in).
Bathroom:
2.4 miles from US-191 on the Dinosaur Trackway road is a bathroom at the trackway trailhead.
Water:
Bring your own.
Bike services:
Altitude Cycle, 580 East Main, Vernal. 435-781-2595
![Area riding map Area riding map](http://cdn1.utahmountainbiking.com/trails/maps/Jass-Chrome.gif)
Single-page riding guide
GPS track files (right-click and "Save as..."):
GPX Jazz Chromoly
Multi-track area file
Area topo map for printing: View map
Lodging, camping, shops: Links to Vernal area resources
![View of Red Fleet from the Dinosaur Trackway Trail View of Red Fleet from the Dinosaur Trackway Trail](http://cdn1.utahmountainbiking.com/trails/images/pics-trails/DinotraxHike01.jpg)
![Theropod (carnivorous dino) track from the Jurassic era. Theropod (carnivorous dino) track from the Jurassic era.](http://cdn1.utahmountainbiking.com/trails/images/pics-trails/DinotraxHike02.jpg)