Bridger-Teton Backcountry Loop (Greys River Road)
Salt River Range high country loop
The Greys River Road serves as your gateway into the heart of the Salt River Range, where Wyoming’s backcountry still runs wild and uncompromised. Starting near Alpine, this loop follows the Greys River drainage south before climbing over McDougal Pass at 9,400 feet, then descending the Smith’s Fork drainage back to civilization. Multiple creek crossings keep things interesting, especially during spring runoff when the water runs high and cold.
Rated moderate to difficult depending on conditions—spring crossings can be tricky, and the pass gets snow well into July. Stock 4WD with skid plates recommended, plus tow straps and recovery gear. Prime season runs August through September for best conditions. No permits required, but fuel up in Alpine and carry extra water. The reward is pristine fishing, abundant wildlife, and camping spots that showcase why Wyoming earned its reputation as the last best place.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Overland Route |
| Surface | Dirt |
| Features | Camping, High Altitude, Remote, Scenic, Water Crossings |
| Length (miles) | 45 mi / 72.4 km |
| Duration | 2-3 days |
| Max elevation (ft) | 9400 ft |
| Best season | August-September |
| Minimum vehicle | Stock 4WD with skid plates |
| Nearest town | Alpine, Wyoming |
| Land manager | Bridger-Teton National Forest |
| Permit required | No |
| Cell service | None |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock 4WD pickup handle this trail?
Yes, but you need skid plates and decent ground clearance. The rocky sections at elevation will test your undercarriage, and several creek crossings require approach/departure angles.
Is this trail passable before August?
No. Snow lingers at the 9400-foot high points well into July, and mud season makes the trail impassable until late summer.
Do I need permits for this Forest Service route?
No permits required for driving or camping. It's all Bridger-Teton National Forest land with standard dispersed camping rules.
What's the worst section of this loop?
The climb to the high alpine section around 9000+ feet gets steep and rocky with loose surfaces. Take your time and use 4-low if needed.
How deep are the water crossings?
Most creek crossings are 6-12 inches deep during normal flow, but scout them first. Late summer is best when water levels drop from snowmelt.