What a nice day for a bike ride. Why not make it official? Hundreds of thousands of people in the Bay Area are expected to do just that today — ditch the car keys and take to two wheels today as part of Bike to Work Day. Events are scheduled throughout the region to celebrate the benefits of commuting by bicycle.

About 3 percent of Bay Area commuters already bike to work, and that number usually spikes on Bike to Work Days. Rather than dropping back down to normal levels the next day, the number of bike commuters tends to stay high for days and weeks afterward, Andrew Casteel, executive director of the Bay Area Bicycle Coalition said.