Aliso\Wood Canyons Wilderness Park
Ralph B. Clark Regional Park
Bolsa Chica Ecological Reserve
Carbon Canyon Regional Park
Ronald W. Casper's Wilderness Park
Chino Hills State Park
Cleveland National Forest
Crystal Cove State Park
Dana Point Youth & Group Facility
Doheny State Beach
Environmental Nature Center
The Nature Conservancy
Inside the Outdoors
Irvine Open Space Preserve
Irvine Regional Park
Laguna Coast Wilderness Park
Oak Canyon Nature Center
O'Neill Regional Park
Peters Canyon Regional Park
Thomas F. Riley Wilderness Park
Richard and Donna O'Neill Conservancy
San Clemente State Beach
San Joaquin Wildlife Sanctuary
Santiago Oaks Regional Park
Santiago Park & Nature Reserve
Shipley Nature Center
Starr Ranch Sanctuary
Transportation Corridor Agencies
Tucker Wildlife Sanctuary
Upper Newport Bay Naturalists & Friends
Upper Newport Bay Ecological Reserve
Whiting Ranch Wilderness Park

Please Visit Our Sponsor
Friends of Harbors Beaches & Parks

Bob Allen - Orange County Wildflowers
Peter Bryant’s Natural History of OC
Stephanie Remington – Bats in Orange County


A 1,200-acre wilderness reserve open only during guided nature walks, astronomy nights, and other scheduled programs. Slide programs and customized tours for groups. As a wildlife sanctuary, Thomas F. Riley Wilderness Park is home to an abundant number of native plants and animal life. Old groves of Western Sycamores and Coast Live Oaks border the park's two seasonally flowing creeks.

When: By appointment only.
Call for program schedule.

Where: 6 miles East of the 5 freeway on Oso Parkway. The park entrance is located 150 feet before the corner of Oso Parkway and Coto de Caza Drive, right side, just outside the community of Coto de Caza.

Phone: 949-923-2265
Fax: 949-459-1295


Donations for Programs: $5-$8/adults;