Experience History Under the Stars!
Join us for a moonlit adventure to the legendary Calcite Mine, nestled in the stunning Santa Rosa Mountains!
This unforgettable journey is guided by a certified Wilderness First Responder, ensuring a safe and memorable experience. Don’t miss your chance to explore this hidden piece of history—spaces are limited, so sign up now!
Who Should Attend
History enthusiasts curious about local WWII sites
Hikers seeking a unique night adventure under the stars
Nature lovers interested in desert landscapes and geology
Anyone eager to explore lesser-known desert history with expert guidance
What to Expect
A moderate 4-mile roundtrip night hike on a dirt road (we will not enter the slot canyon)
685 feet of elevation gain with steady climbing & unique sandstone formations
Stunning views of desert badlands, the Salton Sea, and starry skies
Fascinating stories about WWII history and how this was the only calcite mine ever operated in the U.S. — activated as part of a top-secret wartime effort after Pearl Harbor.
Cooler evening desert temperatures—bring layers
Date: Saturday, August 9, 2025
Time: 7:30 p.m.-11:00 p.m.
Location: Meet at the Calcite Mine Trailhead parking area on S-22.
Please bring:
2 liters of water
Layers
A headlamp
Hiking shoes
Snacks
Cost:
ABF Member: $20
Non-Member: $30 (Or join as an ABF Member today for just $35 and attend this hike for free!)
Student: $15
Cancellation Policy: Cancellation requests must be received at least seven days before the event if you wish to receive a credit or refund.
REGISTER HERE
https://theabf.org/events/night-hike-calcite-mine/
Hike Leader: Matt McArdle has a B.S.in biology from UC San Diego and loves natural history, science, and exploring the outdoors. He first visited Anza-Borrego Desert State Park in 2009 and has since spent many weekends exploring the Park’s trails. In his professional life, he’s worked as a science writer, a science educator, and in marketing communications for various technology-focused companies, including medical devices, irrigation management, and laboratory equipment. Matt is certified as both a California Naturalist and Wilderness First Responder.
You may also like the following events from Anza-Borrego Foundation:
- Next month, 20th August, 07:00 pm, The Fascinating Natural History of Anza-Borrego’s Kangaroo Rats (Webinar) in Borrego Springs, California
- This September, 10th September, 07:00 pm, Anza-Borrego’s Mountain Lions – Lessons Learned in Coexistence (Webinar) in Borrego Springs, California
- This October, 13th October, 09:00 am, California Naturalist in the Desert – Fall 2025 in Borrego Springs
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