Also referred to by some older web pages as “Limestone Canyon Reserve”. Limestone
Canyon is part of the approximately 50,000 acre Irvine Ranch Natural Landmarks in Orange County CA. Historically Limestone Canyon was
once part of the vast Irvine Ranch. The ranch stretched for miles from about the 91 freeway all the way
to the ocean at the Crystal Cove State Park (beach) area. The Irvine Ranch lands were the first to receive
the California Natural Landmark designation.
Limestone Canyon is home to four major ecosystems: Oak woodland, riparian, coastal scrub
and grasslands. A diverse range of native plants and animals are found in the canyon. Horned
lizards, mountain lions, bobcats, deer, coyotes, rattlesnakes, ring-tails and a variety of birds are on the list of wildlife
found here. The canyon includes two popular geological features: the “Sinks”
(often compared to a mini Grand Canyon) and “Dripping Springs” (spring water dripping out of an earthquake fault
down a fern covered rock face).
Canyon has miles of trails for equestrian use (bring your own horse), mountain biking and hiking but access is by sign up/group
events only to protect this beautiful resource, click here and then follow the “activities” link for the guided access schedule.
Trail map hand outs are provided the day of the activity upon sign in.
See the “external links” section at the end of this page for more
information about Limestone Canyon and the Irvine Ranch Natural Landmarks. Click any picture below to enlarge.
Our deer sightings totaled 7 on
our 3/3/12 hike. All were on Dripping Springs Trail. We found numerous deer tracks and what appears to be
cat tracks of various sizes (matching both mountain lion and bobcat), always near the deer tracks.
|Mule Deer on Dripping Springs Trail
|Deer track on the right, Bobcat track on the left. The fourth toe is smeared into the pad imprint.
|Dripping Springs, 10-26-05
|Pool at the base of Dripping Springs rock face, 10/26/05
"Dripping Springs" is a natural spring seeping from an earthquake
fault down a rock face into a pool at the base. The rock face is alive with fern and water loving plants. This
area is accessible by guided hike only for preservation purposes.
Limestone Canyon blooms, pics dated 3/3/12.
From left to right, unidentified native plant, Blue-Eyed Grass and Our Lords Candle.
Irvine Ranch Natural Landmarks website
Watch the video about the land here:
Information and lands map here: http://www.irlandmarks.org/
Limestone Canyon Educational
An older document written for middle school students (pre-natural landmark days) with some interesting facts:
City of Irvine’s
Open Space Program
LA Times article on
Limestone Canyon, dated December 2004, mentions a little about the geological features of Limestone Canyon
An older write up (pre-natural
landmark days) of “Limestone Canyon Reserve”, refers to Canyon historical fact, long ago a cement making operation
mined limestone, hence the name “Limestone Canyon”: http://www.hike-oc.com/limestone_canyon.html
Good list of
Orange County wild lands, information and links, on the Orange County Wild website—interesting fact from OC Wild:
Orange County is the second most biologically diverse county in California while at the same time the smallest and most densely
populated—see the “about” page on the link below for more facts:
A good write up by
Brian & Ashley’s Hiking Blog on the newer Limestone Canyon Shoestring Trail: http://abhiking.blogspot.com/2011/08/limestone-canyon-wilderness-park.html
Another good Brian
& Ashley’s Hiking Blog write up on the Sinks. This write up contains very good directions to Limestone Canyon’s
trailheads and points out the fact there are two, the Augustine Staging Area and the Portela Springs Staging Area (in case
you ever want to visit and haven’t been there) plus links to sign up for a hike: http://abhiking.blogspot.com/2011/03/limestone-canyon-wilderness-viewing.html
Also see Irvine Ranch