Union Pass Historic Route
Continental Divide crossing on historic wagon route
Union Pass sits at 9,210 feet on the Continental Divide, marking one of the lowest crossings of the Divide in Wyoming. This 35-mile route follows the historic path used by Jim Bridger and other mountain men starting in the 1820s, later becoming a crucial link for settlers and freight wagons heading to the Pinedale area and Jackson Hole. The road passes through diverse ecosystems from sagebrush flats to alpine meadows, with excellent wildlife viewing opportunities for moose, elk, and the occasional grizzly bear.
Moderate difficulty requiring high-clearance 4WD due to rocky sections and potential snow at the pass even in summer. The route is typically accessible June through October, though early and late season can present snow challenges. No services exist along the route, so carry extra fuel and water. Multiple dispersed camping opportunities exist on both sides of the pass. This is a perfect introduction to Wyoming backcountry with manageable challenges and rich historical significance without extreme technical demands.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Overland Route |
| Surface | Dirt |
| Features | Camping, High Altitude, Historic, Scenic |
| Length (miles) | 35 mi / 56.3 km |
| Duration | 4-6 hours |
| Max elevation (ft) | 9210 ft |
| Best season | June-October |
| Minimum vehicle | High-clearance 4WD |
| Nearest town | Pinedale, WY |
| Land manager | Bridger-Teton National Forest |
| Permit required | No |
| Cell service | None |
| Water crossings | No |
| Dispersed camping | Yes |
| Official sources | fs.usda.gov |
| Start coordinates | |
| End coordinates | |
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Location
Trail Conditions
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Frequently asked questions
Can a stock Tacoma or 4Runner handle Union Pass, or do I need a lifted rig?
A stock high-clearance 4WD like a Tacoma or 4Runner is the minimum and will get you through under normal conditions. The route is dirt with some rocky sections but nothing that demands a lift — just don't try it in a crossover or 2WD truck.
When does Union Pass Road actually open in spring, and can you run it in late October?
The route is typically accessible June through October, but snow can close it earlier in fall or delay opening past June depending on the year. Check with Bridger-Teton National Forest before heading out in shoulder months — this is 9,200 feet and Wyoming weather doesn't negotiate.
Do I need a permit to drive or camp on Union Pass?
No permit required to drive the route. Dispersed camping is allowed on Bridger-Teton National Forest land — standard 14-day stay limit applies, and you need to camp 200 feet from water sources and the road.
What's the hardest section of the trail and what should I actually be ready for?
The route is moderate overall with no single brutal obstacle, but the high-altitude dirt road can get rutted and soft after rain, making mud the main challenge near the pass. Airing down helps, and if it's been raining recently, give it a day to dry before you commit.
How far is the nearest gas from the trailhead, and is there water on the route?
Pinedale is your last reliable fuel stop — top off there before you head out since it's the nearest town to the start. There are streams along the route but no developed water sources, so bring a filter and carry enough to be self-sufficient for the full 4-6 hour drive.
Trail track
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