Alpowa Summit Rest Area US 12 Westbound Rest Area
Alpowa Summit Westbound Rest Area on US 12 at mile marker 413 keeps things simple – ADA restrooms and parking for about 10 vehicles. Located 20 miles west of Clarkston at 2,785 feet elevation, this small facility handles emergency bathroom needs for westbound travelers crossing between Pomeroy and the Idaho border. The eastbound rest area across the highway offers much more if you can safely access it.
Alpowa Summit Rest Area US 12Westbound Fast Facts
| Feature |
Detail |
| Location |
Garfield County, Washington |
| Highway |
US 12, Westbound access only |
| Mile Marker |
MP 413 |
| Status |
Open Verified September 28 2025 |
| Key Features |
ADA restrooms, mountain pass location |
| Limitations |
Restrooms only, very limited parking |
| GPS Coordinates |
46.4362794, -117.4246939 |
What Works Here
Restrooms function well and meet ADA accessibility standards. Parking handles about 10 vehicles, which works for most situations given the minimal draw. The mountain pass location at 2,785 feet offers views of surrounding country when weather cooperates.
This facility serves westbound travelers who need facilities before reaching Pomeroy, 10 miles west. The location marks where Lewis and Clark crossed in 1806, though historical interpretation sits at the eastbound facility.
What Doesn’t Work
No picnic tables, drinking water, visitor information, or coffee program. This covers emergency restroom needs only. Limited parking fills during busy travel periods, though demand stays manageable most times.
Planning Your Stop
Open around the clock for restroom access. Plan this as a quick bathroom break rather than a rest stop. Pomeroy offers gas stations and basic services 10 miles west, while Clarkston provides full services 20 miles east.
Mountain elevation means weather can change quickly, especially during winter months.
Traveler Tips
• Pack food and drinks – no services beyond restrooms available
• Pomeroy has gas, convenience stores, and limited dining 10 miles west
• Clarkston offers full services including major stores and restaurants
• Eastbound facility has picnic tables and Lewis & Clark historical marker
• Check weather conditions – elevation makes mountain passes unpredictable
• Consider this an emergency stop rather than planned rest break
