This would be an OK ride from the Knoxville/Berryessa Rd side down to the creek and back.
But....don't look for the water level in the creek to fall for at least the next few weeks so using this as a "through" route should be out of the question.
The area around the reservoir is a nice place to stop. If I decide to head up there the first part of next week I'll post a day or two in advance.
I'll be taking the DRZ, not the bigger bikes.