William R. Mason Regional Park
- Park
- Regional draw
- Irvine
William R.
Mason Regional Park, often called Mason Park, offers lawns, paths, and a lake in southern Irvine. The developed park's waterside landscape makes it a place for an easy outdoor break, picnicking, or a walk. The lake and main picnic facilities are west of the park's wilderness section.
Check OC Parks' current opening times, parking fees, and activity rules before visiting. Choose the main park entrance if you want the lake and picnic facilities, and use the posted paths around the water. Bring sun protection and confirm reservations for organized gatherings.
Visitor details reviewed October 18, 2026. Check official visitor information for current access, admission, and operating arrangements. View on OpenStreetMap.
Image credit: ZacharyCrespin / Wikimedia Commons. Original source. CC BY 4.0. Resized and converted to WebP; may be cropped for display.
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