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Limestone Canyon

Limestone Canyon is a regional park in Orange County, California. It’s part of the Irvine Ranch Open Space which is a collection of preserved natural landmarks in the State of California. It’s located at the foothills of the Santa Ana Mountains and is adjacent to Cleveland National Forest. This area was once privately owned, but it was donated to Orange County in 2010.

Limestone Canyon

Limestone Canyon Details

Limestone Canyon Nature Preserve
Silverado, CA
Location details/staging areas are sent to registered participants via email
Dogs are not permitted

About Limestone Canyon

Being a natural preserve, Limestone Canyon is home to a range of wildlife, and is described as one of the “most pristine” wilderness areas in the United States; this is likely one reason why visitors to the area typically arrive to participate in scheduled events led by trained personnel; this is not an “anything goes” public park that allows random hiking, camping, fishing, etc.

Limestone Canyon features a number of restoration projects that are ongoing to keep the area friendly to native species of wildlife. For humans, there are more than 20 miles of trails for hiking, riding, and sightseeing.

Newcomers will want to take in The Sinks, which are sandstone cliffs that had their various layers exposed by some sort of landslide millions of years ago. Also noteworthy; Dripping Springs, which is an all-season spring in the center of the canyon, and Box Springs which is east of The Sinks. It’s another year-round spring popular with sightseers and wildlife alike.

Visiting Limestone Canyon

Limestone Canyon is operated by OC Parks, which runs a variety of preserves in the area. It does so in partnership with the Irvine Ranch Conservancy (which is the land management contractor) and The Nature Conservancy.

Like some other heavily protected areas, Limestone Canyon has specific rules about who can visit the area, when, and how.

The OC Parks official site says you can visit the area during regularly scheduled events and programs, some of which do include self-guided tours on canyon trails. But “other uses” (including casual visits unrelated to scheduled activities) are not allowed. These prohibitions are legally enforceable through deed restrictions and “conservation easements”.

When You Visit

As mentioned above, you cannot show up and begin using trails at Limestone Canyon; check the OC Parks official site under Irvine Ranch to see what scheduled activities might be happening on or near the dates you want to visit. Some regularly scheduled programs include:

  • Hikes with varying levels of difficulty
  • Mountain Biking
  • Equestrian Rides

Many activities are offered by a number of organizations; most programs are free unless otherwise noted. These opportunities are led by trained volunteers, and typically require pre-registration. Walk-in or walk-up registration is not allowed.

All minors must be accompanied by a parent or guardian, and you must bring any required safety gear (helmets, water, appropriate footwear, etc.). It’s important to read the schedule of events carefully; some are aimed at experienced hikers or riders, others are appropriate for those at beginner level.

Some hiking programs are simply sight-seeing, others may place an emphasis on a cardio workout or the amount of mileage covered. Choose your program carefully and don’t overestimate your ability to navigate a challenging trail or ride duration until you are sure you’re ready. Many events are listed with a difficulty rating from one to five, with the following criteria used to determine them:

  • Distance
  • Typical Pace
  • Estimated Stops
  • Accumulated Elevation
  • Steepness
  • Trail Surface
  • Trail Type

What You Should Know About Difficulty Levels

Level One hiking is described as being suitable for “most abilities”. There is no great distance to cover at level one, no significant elevation, and most areas are generally family friendly. That said, this is a wilderness area and you should prepare accordingly.

Level Two is more challenging than Level One, with distances up to two miles. This type of activity level is still at a slow pace, there are many shaded areas to rest in, and these tours are typically over rolling terrain.

A Level Three experience ups the ante; these are often up to six miles long with elevations as high as 1000 feet. The pace is described as “moderate” and there are “some stops” along the way. This experience is still on “natural surface” trails, hills, and roads with moderate elevations.

Level Four brings the experience to a full 10 miles or “occasionally longer” and the elevation can be double what you get at Level Three–you could go as high as 2000 feet. There are “a few” steep climbs as well as “only a few” stops for rest. These experiences have fewer shade areas than the levels prior, which is an important consideration for some.

Level Five is the most advanced option, with distances exceeding 11 miles, high elevation, and hilly terrain. If you choose a Level Five, be aware there will be little opportunity to rest or regroup and time spent exposed to the elements is higher than other levels.

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Joe Wallace
Joe Wallace has been covering real estate, mortgage and financial topics since 1995. His work has appeared on ABC, USA Today, The Pentagon Channel, plus a variety of print and online publications. He is a 13-year veteran of the United States Air Force and a former reporter for Air Force Television News.