Diamond Valley Lake
- Water supply reservoir
- Regional draw
- Winchester
Diamond Valley Lake is a major drinking-water reservoir near Hemet and Winchester, with a surrounding landscape managed for water supply and compatible recreation.
Its broad water views and nearby trails offer a distinct destination in inland Riverside County.
Check the water district and recreation operator’s current access, fees and seasonal schedules before arriving. Boating and fishing have specific requirements, and swimming is not part of the reservoir’s recreation program. Use designated access points and respect water-protection rules. The neighboring aquatic center and community park are separate facilities with their own arrangements.
Visitor details reviewed October 18, 2026. Check official visitor information for current access, admission, and operating arrangements. View on OpenStreetMap.
Image credit: Lvi56 / Wikimedia Commons. Original source. CC BY-SA 3.0. Resized and converted to WebP; may be cropped for display.
