Eco-warrior Jack Johnson is urging fans to "green" his concerts by cycling to them and using his bike valet service backstage.

The surf-rocker has created an initiative to encourage gig-goers to pedal to shows - and win prizes for parking their bicycles.

A post on the Better Together singer's new JackJohnsonBikeValet.org website reads: "Help to green a Jack Johnson event by making your travel to the venue climate neutral and bike to the show! And because cool people doing cool things deserve cool stuff, participants of the Jack Johnson Bike Valet will automatically be entered into a day-of random drawing for some cool prizes including Jack Johnson signed swag!"

Fans can even use the website to plan ahead and pre-check their bikes at gigs.

Upcoming shows in California next week (beg25Aug14) will all have bike valet sites.