Gather at Glen Park BART Plaza for a 10-mile walk showcasing the Crosstown Trail’s 5th Anniversary route changes. It will begin with a loop that includes the Cuvier Commons mural, the Bernal Cut, the Arlington Path, and the Arlington Triangle. It will end with another loop along Presidio’s Mountain Lake Trail, past the Marine Cemetery, and back to Geary and Park Presidio where you’ll be able to hop aboard the 38 Geary. Somewhere along the trail, a spot will be found to enjoy the bag lunch you’ve brought from home.