to get there:
From Yolo County, take Highway 128 toward Lake
Berryessa. Turn right at the 128/121 intersection, staying on 128.
At the Turtle Rock bar, turn right again onto Berryessa/Knoxville road.
Continue on Berryessa/Knoxville, past the lake, over both Pope Creek and Putah
Creek bridges at the North end of the lake, and up into the mountains beyond.
The road will narrow, roughen, and wind up into the canyon until you reach the parking on the side of the road at mile marker 28. There are 8 concrete low-water crossings on Knoxville road, prior to the parking. Parking is available
at an old corrall on the right side of the road. You can't miss it, and I have
an image of the parking area below.