Around Letts Lake, the Letts Lake Loop is a 7.5 mile ride. This route offers a nice, high elevation ride through conifer/oak forest. The route is situated entirely on low maintenance level roads which are well signed and easy to follow. This loop offers a moderate day ride for most mountain bike enthusiasts with a few sustained grades. The route is easiest to follow in a clockwise direction. The only developed camping area along this route is at Letts Lake, where potable water, restrooms and garbage service are provided during the recreation season. Camping, picnicking, fishing, swimming, and non motorized boating are available at Letts Lake.
To get there from Interstate 5 on Maxwell/Sites Road to Sites. Continue west on Site/Ladoga Road to Ladoga Road to Ladoga. Continue west on Ladoga/Stonyford Road to Stonyford. From Stonyford travel west on the Fouts Springs/Letts Lake Road to Letts Lake Campground. This area can also be accessed from Interstate 5 at Willows. Travel west on State Highway 162 to Elk Creek then south on Country Road 306 to Stonyford.
Overall, Letts Lake Loop Trail is the 76th most popular mountain bike trail of all 132 mountain biking rides in California.