Out of downtown Napa on I-80 to Auburn and up Highway 49 to Nevada City, then North Bloomfield Road, Tyler Foote Crossing and Pliocene Ridge Road through Alleghany and Forest.

Out of downtown Napa on I-80 and Highway 50 to Placerville, then up Union Ridge and Mosquito Road to the bridge the ride is named after.

Out of downtown Napa on I-80 and Highway 50 to Pollock Pines, then north on Ice House Road and over to Wentworth Springs Road past Quintette.