Elevation: 6,748 ft
This peak is not in the book.
Joe Peak is located just west of Hidden Lake which sits between it and Red Top. This is rugged, scenic country with lots of exposed granite. Hidden Lake is reached by trail. See [(D)(1)] on Page 48 of the book. The Forest Service describes the route to the lake as follows:
The trail switchbacks through an old burn for the first 0.4 mile at about a 15% grade. It enters the woods at this point and sidehills at an almost level grade for another 0.5 mile and meets Hidden Lake at about 1.0 mile. Fishing is good and there are campsites available around the lake.
The best route from the lake to the summit appears to follow the trail toward Red Top. Once at the saddle above the lake, scramble the ridge west to the summit. I have not been able to confirm the difficulty of this route. USGS Grass Mountain