The Adventure: Do your bidding for a bicycle

What: The twice-yearly University of California, Davis, auction of abandoned bikes.

When: Viewing starts at 8 a.m. Saturday; bidding gets under way at 9 a.m.

How to get there: The auction is in the West Entry Parking Structure at UC Davis. From Sacramento, take Interstate 80 west and exit north on Highway 113, then take the Hutchison Drive exit right toward the campus. The parking structure will be on the left at Dairy Road; follow signs to the auction.

The organizers say: Davis has long embraced the bicycle as an Earth-friendly form of transportation and perhaps even a way of life, but along with that embrace can occasionally come abandonment.

Every year on the UC Davis campus, up to 1,000 bikes are left behind – many of them, UCD Bicycle Program coordinator David Takemoto-Weerts speculates, left by graduating seniors. "Sometimes people forget where they parked their bikes, but a vast majority of them are truly abandoned," Takemoto-Weerts said.

This weekend, about 400 bikes of various types and sizes will be put on the auction block, or "recycled," so they'll be back on the road. The auction benefits the campus Bicycle Program, which promotes bike safety and encourages bike transportation throughout the city.

The bikes are screened to make sure they have not been reported stolen. Many are fixer-uppers, but with a little attention and maintenance, they are ridable.

"We do this as a service," Takemoto-Weerts said. "A wide range of people come out, including bike geeks and those who are just curious."

Admission: Free. Register for the auction (registration available Saturday morning only).

Information: (530) 752-2453 or taps.ucdavis.edu/bicycle/ auctions/