Find Nearby Peaks

This peak is not in the book. Livingston Douglas added a new descent route, new photos, and a trip report of a 4-peak ridge traverse found at the following link: The Argosy Adventure. Updated October 2025

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Argosy Peak is located about a mile southwest of Err Peak and the main Pioneer Mountain Crest. It is most often climbed with Err Peak and Pion Peak. The round trip shown below covers 9.1 miles with 4,300 feet of elevation gain. USGS Trail Creek

Access

Argosy Creek is accessed from ID-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 through 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.

Use the links below to read trip reports from John Platt and Dan Robbins for just such an excursion.

South Ridge/West Gully Descent by Livingston Douglas

South Ridge/West Gully, Class 2

The Descent

This is the final leg of a 4-peak adventure (The Argosy Adventure) that includes Peak 10500, Pion Peak, Err Peak, and Argosy Peak. It covers 10.5 miles with 5,300 feet of elevation gain round trip. Surprisingly lacking a summit cairn, I built a nice cairn on the high point of Argosy Peak. From the summit, descend the ridge crest south then southwest then south on miserably-loose talus and boulders to reach the head of a forested gully that sits just north of the 8,740-foot saddle that is located just underneath, and north of, Point 8978.

Leave the ridge and descend an open, rocky gully that heads southwest then west down to the Argosy Creek drainage. The gully widens as you descend. It is easiest to stay on the left/south side of the gully initially in easy pine forest with a gravel base. Lower down, move into the scree-filled gully as it opens up and widens out. The scree is still unstable so be careful. Reach the easy terrain of the wide Argosy Creek drainage and follow game and cattle trails back to the crossing of Muldoon Creek.