William R. Mason Regional Park

Irvine, Orange County, CA

Parking$3 weekdays, $5 weekends
Source
DogsOn leash
Source
Hours7 a.m.; closes 6 or 9 p.m. by season
Source
Size
334 acres Source
Managed by
OC Parks

About William R. Mason Regional Park

339 acres of shade trees around a 9-acre lake, with bike paths, model boat sailing, and a wilderness hiking area. Source

Populated with rows and rows of shade trees and a beautiful 9-acre lake, the 339 acres of Mason Regional Park offer something for every member of the family. There are biking paths, model boat sailing, a wilderness hiking area, three separate toddler areas and everything else you need to escape, right here in the middle of it all.
From the official park page · checked Oct 16, 2026

Facilities

  • BBQ Grills
  • Drinking Water
  • Horseshoes
  • Picnic Area
  • Playground
  • Restrooms
  • Volleyball

Facility details: OpenStreetMap

William R. Mason Regional Park at a glance

W
  • WDrinking water · 1
  • Named trails · 2

Outline: CPAD. Points and trail lines: OpenStreetMap contributors. Not for navigation.

Trails

TrailMapped lengthElevationSurface & uses
Sand Canyon Wash Trail2 mi81 ft up & down57–112 ftPavedBikesUnpaved
Sand Canyon Wash / University Trail0.9 mi
Turtle Rock Trail0.2 mi9 ft up & down72–83 ftPavedBikes

Trail names and mapped lengths come from OpenStreetMap; lengths count only the part inside the park boundary. Up-and-down totals (climbing plus descent, one way) and elevation ranges are estimates from USGS 3DEP elevation (about 15 m grid) sampled along the mapped line. Use the official guide map for the route and current closures.

Getting to William R. Mason Regional Park by bus

Bus stops within about a quarter mile of William R. Mason Regional Park, mapped in OpenStreetMap. Check the transit agency for schedules.

Rules & reservations

Official park page

    Fall–winter: 7 a.m. to 6 p.m. Spring–summer: 7 a.m. to 9 p.m.

    Map & directions

    1Location overview · map data © OpenStreetMap

    33.655119, -117.832732Get directions

    Nearby parks

    Straight-line distance
    Upper Newport Bay Nature PreserveNewport Beach · 2.1 mi · Drinking Water, PlaygroundLaguna Coast Wilderness ParkLaguna Beach · 6.3 mi · Drinking Water, Picnic AreaTalbert Regional ParkCosta Mesa · 6.7 mi · Drinking Water, Picnic AreaMile Square Regional ParkFountain Valley · 7.7 mi · BBQ Grills, Drinking WaterPeters Canyon Regional ParkTustin · 9.0 mi · Picnic Area, Restrooms

    Continue exploring

    Orange County parks Playgrounds

    Sources & verification

    Last verified: Oct 16, 2026
    1. California Protected Areas Database (CPAD) 2026aname, county, agency, access, acres
    2. OC Parks park pageofficial_url, hours, hours_note, fees, dogs, description
    3. OpenStreetMap facilities and trailsfacilities.bbq-grills, facilities.drinking-water, facilities.horseshoes, facilities.picnic-area, facilities.playground, facilities.restrooms, facilities.volleyball, trails
    4. U.S. Census Bureau place boundariescity
    5. OpenStreetMap: parking, restrooms, water, trailheads, trail lines, and bus stopsvisit
    6. Terrain Tiles elevation (USGS 3DEP), sampled every 20 m along OpenStreetMap trail linestrails.elevation
    7. Official park page (introduction excerpt)intro
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