The Silverado Trail, which branches off from Route 121 just east of Union, is one of the most scenic stretches of road in Napa, with one of the highest concentrations of wineries in the area. Though somewhat trafficked, The Silverado Trail has a wide paved shoulder, and is a quieter road than Route 29, which shares a similar trajectory. From Trancas Street in Union, runners can follow The Silverado Trail north along vineyard fields for roughly 27 miles to the intersection with Lincoln Ave. in Calistoga. Since the trail roughly parallels the Napa Valley Vine Trail, many loop options are possible using cross streets to cut from the Silverado Trail to Route 29.
Oxbow Loop: This is a nice long loop coming off The Silverado Trail right in downtown Napa, incorporating some quieter roads and featuring some nice views. Start at Oxbow Park, cross the river on 1st Street and turn RIGHT onto Silverado Trail. Bear LEFT onto Coombsville Road, turn LEFT onto First Ave (or Third Ave for a longer run) then turn LEFT onto Hagen Road. Where Hagen Road returns to the Silverado Trail, turn LEFT to return to the start.
See our routes in the North of Napa for more loops off the Silverado Trail.