Irvine Ranch Open Space

Irvine Ranch Open Space
13042 Old Myford Rd.
Irvine, CA 92602
(714) 973-6696
irvineranchopenspace@ocparks.com 

Hours: Access to areas in the Irvine Ranch Open Space, including Black Star Wilderness Park and Fremont, Limestone and Weir canyon nature preserves is available through scheduled programs.

For a full list of activities, please visit letsgooutside.org/activities/.

On June 29, 2010 the Orange County Board of Supervisors voted to accept a donation of approximately 20,000 acres from the Irvine Company to the County for preservation and guided recreation.

These special, protected wildlands, known collectively as the Irvine Ranch Open Space, are operated by OC Parks, with public programs and activities available through the Irvine Ranch Conservancy.

Based on the geological and ecological significance, nearly 40,000 acres of open space on the historic Irvine Ranch, including the 20,000 of the Irvine Ranch Open Space, have been designated a Natural Landmark by both the State of California and the U.S. Department of the Interior. This honor recognizes the exceptional value of these lands to California and the entire nation.

Recreation opportunities are available through regularly scheduled programs. These activities include hiking, mountain biking, equestrian rides, naturalist-guided tours and self-guided wilderness access days. Other uses are prohibited by the terms of the deed restrictions, conservation easements, County wilderness park designations, and the Orange County Central Coastal Natural Community Conservation Plan permit.

We invite you to visit letsgooutside.org and select from the many free activities offered. In addition to a variety of recreational programs, there are opportunities to participate in scientific research, stewardship and other volunteer activities.

News

May 6, 2016 
New East Sinks Viewing Deck Opens in Limestone Canyon

News ImageThe new East Sinks Viewing Deck, which boasts stunning vistas of Orange County’s very own “mini Grand Canyon,” is now open for visitors after a ribbon-cutting ceremony May 3 in OC Parks’ Limestone Canyon Nature Preserve. Orange County Supervisor Todd Spitzer and OC Parks staff were joined by hikers, mountain bikers, equestrians, and Irvine Ranch Conservancy staff and volunteers in dedicating the new deck, which is the second platform overlooking The Sinks.


November 18, 2014 
Board of Supervisors Accepts 2,500-Acre Gift

Today the Orange County Board of Supervisors voted to accept 2,500 acres of open space, donated by the Irvine Company to the County for preservation and public recreation. The donation provides additional connectivity to the 20,000 acres the Irvine Company donated to the County in 2010, which marked the largest single donation of land to the County in its history. The land accepted today was previously slated for construction of approximately 5,000 homes.


August 20, 2014 
Explore OC Parks’ Irvine Ranch Open Space

News Image

In 2010, OC Parks accepted a gift or 20,000 acres of open space from the Irvine Company. These special, protected wildlands, known as the Irvine Ranch Open Space, are operated by OC Parks, with public programs and activities available through the Irvine Ranch Conservancy.


December 4, 2015 
Polyphagous Shot Hole Borer in OC Parks Trees

The Polyphagous Shot Hole Borer (PSHB) is an invasive beetle that attacks common native and landscape trees, leading to branch dieback and overall decline. This can have a devastating effect on local trees, and you may see some being treated or removed in County parks.


February 9, 2015 
Invasive Pest Found in Orange County

Gold Spotted Oak Borer (GSOB), an invasive beetle that has killed thousands of oak trees in San Diego and Riverside counties in a short span of time, has now been detected in Orange County. The GSOB was discovered in approximately 60 trees on County park land in northern Orange County. Since GSOB is transported in oak firewood, it is critical that Californians keep firewood local and not move it out of the area.


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