Tree Planting at Rock Ledge Spring
July 27, 2026Join us for a fun day clearing out any re-growing Arundo and planting native trees and shrubs at this remarkable oasis in town.
Border Wall Construction Cuts Through Shaded, Biodiverse Corner of San Rafael Valley
Border wall construction continues in southern Arizona’s San Rafael Valley, causing senseless destruction. Cottonwoods estimated to be as old as our country have been toppled in Lochiel. And as you…
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Erosion Control in the Catalinas
July 24, 2026Join us in the Santa Catalina Mountains for a weekend building erosion-control structures in areas burned by the 2020 Bighorn Fire. Together, we can protect springs from landslides and ensure the mountain absorbs even more rain and snowmelt, recharging the aquifer that plants, wildlife, and people like us depend on. Note: Carpooling from Tucson is available, and day-trippers are most welcome.
Searching for Springs in Sierra Los Ajos: A Challenging and Wonderful Experience
July 21, 2026Hi, we are Nayeli and Sofía, students of Environmental Sciences Engineering at the University of Sonora in Hermosillo, and we’re doing our professional internships with Sky Island Alliance. We just…
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Leaping Lagomorphs: A Deep Dive on Rabbits and Hares of the Sky Islands
July 9, 2026In this virtual Coffee Break, SIA Wildlife Specialist Meagan Bethel takes us on a deep dive into the different cottontail and jackrabbit species that make their home in the Sky…
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Our First Encounter in Sierra La Madera
July 8, 2026Dariana Valdez and Ximena Velásquez, students of Environmental Sciences Engineering at the Universidad de Sonora and professional interns at Sky Island Alliance, tell us about their experience in Sierra La…
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A New Stage for Spring Monitoring in APFF Bavispe
July 7, 2026In recent years, water has become a very scarce resource in the region, due to several factors, including the overexploitation of aquifers, rivers, and reservoirs for mining, overgrazing, climate change,…
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Ocelots: Elusive Travelers
June 29, 2026This article first appeared in The Desert Leaf and is part of a series featuring the Sky Islands. The longest documented path taken by an ocelot (Leopardus pardalis) was recently…
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Feds Dam Santa Cruz River Ahead of Border Wall Construction
June 22, 2026Video by Leslie Ann Epperson, SmallWheel Films. This is the second video in a series on border wall developments in the San Rafael Valley. More tough news from the San…
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Erosion Control in the Catalinas
June 18, 2026Join us in the Santa Catalina Mountains for a weekend building erosion-control structures in areas burned by the 2020 Bighorn Fire. Together, we can protect springs from landslides and ensure the mountain absorbs even more rain and snowmelt, recharging the aquifer that plants, wildlife, and people like us depend on. Note: Carpooling from Tucson is available, and day-trippers are most welcome. We’ll be camping at Spencer Campground on Mt. Lemmon.