Napa - take Trancas east towards Lake Berryessa. It becomes Monticello Road, also known as Highway 121. Stay on this road as it becomes Highway 128 (without turning), and continue on past Monticello dam. On a curve you will pass two silver gates on the right - the second gate with the UC Davis logo is the entrance. Past the entrance will be a large dirt pullout on the left where you can park.
Napa Co. up- and mid-valley - from Silverado Trail, take Highway 128 past Lake Hennessy. At the junction with Highway 121, stay on 128 which will entail a left hand turn. Continue on past Monticello dam. On a curve you will pass two silver gates on the right - the second gate with the UC Davis logo is the entrance. Past the entrance will be a large dirt pullout on the left where you can park.
Yolo Co. - from Winters take Highway 128 to Lake Berryessa. You'll pass an RV resort on the shores of Putah Creek. Just after the bridge and the county line to Solano Co., take a right into a large dirt pullout area and park. The entrance with the UC Davis logo is just up and across the road.
Note - a high resolution map (suitable for printing) is available.
