Please review our hiker info page to familiarize yourself with hiker safety rules and our hike ratings so that you can select hikes that meet your level of fitness. Unless specified otherwise in the activity descriptions below, hikes have a 15 person limit, and they begin in the ABDNHA parking lot.

4WD

Events for February 21, 2026

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Geology Hike: Ash Wash

ABDNHA Parking Lot 652 Palm Canyon Drive, Borrego Springs

Speaker: Don Barrie, Geoscience Educator, ABDNHA Board Member

Join Don Barrie for this moderate 5-mile loop hike to Ash Wash, a tributary of Coyote Canyon. Our destination will be the Bishop Tuff—an ash layer deposited around 760,000 years ago when an enormous volcanic eruption created the Long Valley Caldera in the eastern Sierras. During this eruption, huge volumes of ash were blown into the atmosphere, resulting in widespread deposition as far away as the Midwest. At the entrance to Ash Wash, we’ll examine the Coyote Creek Fault—the western branch of the San Jacinto Fault Zone. Max 23 people (carpooling is encouraged). Bring lunch and water. 4WD vehicle recommended. Hiking poles, if you have them. Meet at ABDNHA. No charge, but registration is required at the Nature Center, 760-767-3098.

4WD Tour: Yaqui Flats (Members Priority) – FULL (Waitlist)

ABDNHA Parking Lot 652 Palm Canyon Drive, Borrego Springs

Leader: Dave Walters, ABDNHA Volunteer  
PROGRAM IS FULL - PLEASE CALL ABDNHA at 760-767-3098 to get on waitlist.
Level 4 Short Wheel Base Vehicle only**

We meet for our trip at ABDNHA parking lot at 9:00am. Leaving Borrego Springs, we caravan west on Highway S22 for 7 miles and enter the trailhead at Old Culp Valley Rd. Next we turn onto Jasper Trail and then the Grapevine Trail. We stop at our destination of Yaqui Flats. If winter rains were sufficient, there will be abundant flowers. When leaving, we continue to Yaqui Well and highway 78. Bring food and water. Wear weather-appropriate clothes, and bring a hat and chair. We will using 2-way GMRS radios on channel 15. No charge. This is a members priority trip. Stop by or call the Nature Center to reserve, 760-767-3098.

**Level 4 4WD REQUIRED due to deep sand, large rocks, steep sections, large obstacles, or rough conditions

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