If you are looking for an outing of only Shoshoni Peak and you want a more challenging route than the Pawnee Pass Route, try the east ridge of Shoshoni Peak. This route is a more direct route that is shorter in distance than the Pawnee Pass Route. Here is a distance and vertical gain comparison of the two routes submitted on Shoshoni Peak.
You can also make this a loop route by ascending the east ridge and descending the Pawnee Pass route.
9-miles and 2,800-ft. The following is a route description of the east ridge on Shashoni Peak.
Starting at the Long Lake Trailhead (10,500 ft.), hike .25 miles to Long Lake and continue another 2 miles on the well-worn trail to Lake Isabelle at 10,868-ft. Take the turnoff to Pawnee Pass and follow the trail as it switchbacks up into a beautiful high basin at 11,770-ft, east of Shoshoni Peak. At 11,860-ft leave the Pawnee Pass Trail and head directly to the steep east ridge of Shoshoni Peak. While en route to the east ridge, be environmentally conscious of the delicate, grassy marshes that reside in this basin.
Once at the base of the steep east ridge, you can survey your route. The direct east ridge is steep, ascending 1000 ft of vertical gain in .85 mile. The ridge consists of grassy ledges and a few minor headwalls to climb. Shoshoni’s east slope consists of steep unstable talus. The most reasonable route is a combination of the ridge crest and the east slope. It is best to ascend the ridge crest and traverse out on the slope into a shallow gully to bypass any headwall difficulties.
Always be prepared for an overnight stay, if worst comes to worst.