Chinook & Crystal Peaks

Nice 10 hour loop of Crystal Peak, Chinook Peak, Sheep Lake, Sourdough gap and Upper Crystal Lake.
Explored 150' down the steep gully on the east side of Chinook Peak, but gave up and climbed back up. We then followed the standard route from 6400' on the south ridge of Chinook SSE down to the 6000' bench and east down to Sheep Lake.