AC Thompson, left, and Jasmin Malabed unfurl a new banner at Dirt World in Richmond, CA, on Saturday March 4, 2017. Dirt World is a bike skills park currently under development in Richmond, CA and is the brainchild of Richmond residents Jasmin Malabed and Dennis ÒD2Ó Hoskins, founders of the Dope Sauce Bike Club, a grassroots program that introduces city kids to cycling of all varieties. Photo: Michael Short, Special To The Chronicle