Free things to do in Orange County Coast & Central, Los Angeles

William R. Mason Regional Park

📍 Irvine · Orange County Coast & Central

339-acre OC Parks regional park with a 9-acre lake, picnic areas, trails, playgrounds, and a wilderness hiking area. Trail bridge project noted through November 2026 in the wilderness area.

💵 Fall–winter hours 7 a.m.–6 p.m.; spring–summer 7 a.m.–9 p.m. Parking $3 Mon–Fri, $5 Sat–Sun (higher some holidays).

🕑 Daily 7am–6pm

✓ Checked on the official page Nov 3, 2026