Sierra State Parks Foundation, Cooperating Association for Donner Memorial State Park, hosts a monthly Sierra Speaker Series which connects folks to the rich cultural and natural history of the area. Join us on June 18th at Donner Memorial State Park Visitor Center to learn about Mark Twain's history with the Lake Tahoe area! Doors open at 5 pm, and the presentation is to follow at 5:30 pm. Admission is a suggested $5 donation. Light refreshments will be available. Parking is free after 5 pm.