Hidden Falls Regional Park is located west of Auburn where the eastern edge of the Sacramento Valley brushes up against the low foothills of the Sierra. The park was recently expanded from 221 acres up to 1,200 acres and includes an extensive trail network used by hikers, equestrians, and mountain bikers. It can get busy on the weekends, but it's a wonderful place for a day hike if you can get there during the week when it's less crowded. If you make it out to the park, be sure to take the trail out to the wooden observation deck that overlooks the 30 ft. falls that give the park its name.

The development of Hidden Falls was made possible by the Placer Legacy Open Space Program. Placer Legacy was formed to conserve open space, preserve the local farm economy, protect native plants and wildlife, and provide recreational opportunities within Placer County. Supporters include the California Natural Resources Agency, Sierra Nevada Conservancy, California Conservation Corps, REI, Inc., Folsom Auburn Trail Riders Action Coalition, Sun City Lincoln Hills Hiking Club, and California State Parks.