Mountains to Sea Trail

This 22-mile trail passes through portions of five towns and cities and unincorporated areas of Orange County.

photo: Limestone Canyon, Irvine Ranch Natural Landmarks

Length: 22.00 miles
Loop Trail? No
Type: Greenway, Urban Trail
Agency: Nonprofit
Entry Fee? No
Parking Fee? No

Allowed Uses:

Bicycling (on pavement)
Bicycling (off pavement)
Dogs - On leash
Equestrian - Riding
Pedestrian - Walking/Hiking/Running
Roller/Inline Skating
Wildlife Observation

See more details.


Location: Irvine Ranch, Orange County, Connects Irvine Ranch S through Irvine to Newport Beach.

State(s): California
Counties: Orange
Longitude: -117.89029
Latitude: 33.62059

Driving Directions

Driving directions are not available for this trail. Can you provide this missing data?


Your journey begins with a docent-led hike in rugged, oak-filled Weir Canyon. It then takes you south through six jurisdictions, five cities, and a portion of the County of Orange - guaranteeing that the only constant on this trek is an exhilarating change of scenery and topography.

The Mountains to Sea Trail, the backbone of the 50,000-acre Irvine Ranch Natural Landmarks, was created through cooperative municipal planning to let people of all ages and abilities experience unimpeded the magnitude, magnificence and diversity of the Reserve.

From Weir Canyon to Irvine and Peters Canyon Regional Parks, past the historical Irvine Ranch agricultural headquarters and along the San Diego Creek Channel to Upper Newport Bay, there's no more enjoyable way to experience one of the nation's most spectacular networks of parks, trails, and preserved natural lands.

Additional Details

Width: 120 inches.
Primary Surface: Asphalt
Secondary Surface: Crushed Rock

Elevation Low Point: Not Available
Elevation High Point: 1,339
Elevation Gain (cumulative): Not Available

Year Designated:

Supporting Webpages and Documents

Website: Irvine Ranch Conservancy
Website: American Trails Featured NRT

Contact Information

For more information and current conditions, contact the trail manager (listed below). For questions, suggestions, and corrections to information listed on the website, contact American Trails.

Trail Management:
Field Operations Manager
Irvine Ranch Conservancy
4727 Portola Parkway
Irvine, CA 92602
(714) 508-4757

Information Contact:
Wida Karim
Communications Manager
Irvine Ranch Conservancy
4727 Portola Parkway
Irvine, CA 92620 -1914
(714) 508-4760
[email protected]



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