Upper_Letts_Lake_Campground.jpg Published August 25, 2013 at 500 × 299 in Upper Letts Lake – Camping off the beaten track ← Previous / Next → Upper Letts Lake Campground Upper Letts Lake Campground – Just 3.5 hours drive from the San Francisco Bay Area, Upper Letts lake campground is a great place to relax and unwind. Kayak, fish, hike, or just sit and watch the amazing sunsets.