Skip to content
Photo courtesy of OC Parks.
On this page:
Top

Organization

OC Parks

The 26-facility county parks system includes the Irvine Ranch Open Space, comprising Limestone Canyon, Weir Canyon and Fremont Canyon nature preserves, as well as Black Star Canyon Wilderness Park.

Top

Location

Top

Upcoming Activities

Join us at Fremont Canyon Nature Preserve

Certificated Animal Behavior and Tracking Volunteers will be observing and analyzing tracks and scat found on and near the trails of Fremont Preserve and in Santiago Creek on the Landmarks. If you have attended the ABAT class and are a...

Date:
Sat, 09/20/2025
Time:
8:00 am - 1:00 pm
Where:
Fremont Canyon Nature Preserve
Difficulty Rating:
2
Distance:
3 miles
Minimum Age:
18
Registration:
3 of 5 Spaces Left

Come enjoy an early morning hike in Fremont Canyon Nature Preserve, part of OC Parks’ Irvine Ranch Open Space. Our hike climbs steeply from the mouth of Fremont Canyon, past an abandoned coal mine up to the Fremont Weather Station...

Date:
Sun, 09/21/2025
Time:
7:00 am - 9:30 am
Where:
Fremont Canyon Nature Preserve
Difficulty Rating:
4
Distance:
6 miles
Minimum Age:
18
Registration:
0 of 15 Spaces Left

Come enjoy a scenic evening cardio hike in the remote Fremont Canyon Nature Preserve, part of OCParks’ Irvine Ranch Open Space. Our hike climbs steeply from the mouth of Fremont Canyon, past an abandoned coal mine, up to the Fremont...

Date:
Sat, 10/04/2025
Time:
5:00 pm - 7:15 pm
Where:
Fremont Canyon Nature Preserve
Difficulty Rating:
4
Distance:
6 miles
Minimum Age:
18
Registration:
Registration Opens on 09/19/2025 at 8:00am
Top