Nine Napa County locations have been established as “Energizer Stations” for the Thursday, May 13 “Bike to Work Day.” May 13 is the Bay Area’s 16th annual “Bike to Work Day,” when an estimated 150,000 commuters are expected to ride to work or school. Five of those locations are in Napa, one in American Canyon, one in Yountville and two are Upvalley: the Calistoga City Hall and St. Helena Cyclery, both which will provide refreshments from 7 a.m. to 9 a.m. for bike commuters.