Muir's Rock is a large, flat boulder on the edge of the King's River, a short walk from the end of the road. Muir used to give talks from the boulder. It seemed like a good place to paint from too.
I set my box easel on the rock without the legs extended and spread my pastels out around me and painted while sitting on the rock.
I am troubled by the color of the water in the foreground, but it really was very close to this color.