William R. Mason Regional Park 
18712 University Drive
Irvine, CA 92612
949-923-2220
http://www.ocparks.com/masonpark/
Park: Bike, Hike, Picnic, Walk
William R. Mason Park’s eastern wilderness section offers three miles of hiking and biking trails. 123 of acres of protected land serve as a natural reserve dedicated to habitat enhancement. Many native animal species inhabit the area.