Official Bike to Work Day throughout the Bay Area is Thursday.
Tech companies including Google and Facebook, as well as cities and nonprofit organizations, have collaborated to host more than 150 stops around Bay Area communities including 26 stops in San Francisco.
"San Mateo County commuters are experiencing longer commutes, extended peak-hour traffic and crowded trains," the report stated.
In response, organizers are hoping the event will bring more newcomers out to the streets to give commuting by bicycle a try.
Last year's weeklong commuter challenge on the Peninsula had a combined 789,000 miles logged from 1,306 participants and an additional 12,000 bicycle riders counted at the annual Bike to Work Day stations in Santa Clara and San Mateo counties.
National Bike to Work Day follows the local event on May 19.