Peak 10500

Elevation: 10,500 ft
Prominence: 600

Peak 10500 from Pion Peak.

Climbing and access information for this peak is on Page 256 of the book. The elevation has been updated to 10,500 feet. In addition, access is not currently blocked by private property.


Peak 10500 is best climbed from Argosy Creek. It may be possible to climb the peak from the Left Fork Antelope Creek from the Fishpole Lakes [(D)(1)(a.1) on Pages 260-261]. However, the side facing this drainage is much steeper than the slopes above Argosy Creek. USGS Smiley Mountain

Peak 10500 from Pion Peak.

Peak 10500 as viewed from Pion Peak.


Updated Access

Argosy Creek is accessed from US-20 at Carey, Idaho. Look for the sign on the east end of town stating “Little Wood River Reservoir 11.0 miles.” See [(E)(1) on Page 261]. Take this good paved road out of town passing homes, farms, and ranches. The road turns to good gravel before reaching the turn for the reservoir. Continue on the main road. At 17.4 miles, the road takes a sharp right turn and runs through the middle of a ranch. Continue past the ranch buildings for 6.8 miles to an unsigned junction just past a turn for another ranch.

This road, shown on the map below, is FS-126. Most maps show it as a 4WD road when, in fact, it is a good road suitable for most vehicles when dry. Follow FS-126 as it skirts around the ranch property and works its way into upper Muldoon Creek for 2.5 miles where the road is wide enough to park. This spot is just past the confluence of Muldoon Creek and Argosy Creek. Muldoon Creek is clogged with willows. Finding your way across the creek and then through the willows may be the crux of the climb. The best spot we found was 0.1 miles south of our parking spot. Good luck.


Southeast Ridge (Class 2+)

Hike up Argosy Creek to the saddle between Peak 10500 and Pion Peak. From the saddle, ascend the peak’s steep Southeast Ridge to the summit.

Additional Resources

Mountain Range: Pioneer Mountains

Longitude: -113.85859   Latitude: 43.63369

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