After nearly 20 years of restoration, Mountain Lake is enjoying an exciting new chapter of life. With the partnership of the San Francisco Zoo and local universities and partners, many lost creatures that once lived here have returned to the lake's community: Western Pond Turtles, Pacific Chorus Frogs, and more. Come meet Presidio Trust Biological Science Technician Amy Chong near the playground at Mountain Lake to learn about the lake's past, present and future. Learn about the City Nature Challenge and discover what you can do to show your love for Mountain Lake (and other lakes near you!). Rain cancels.