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Image of water with brown hills behind the water and the words Nature Trek at El Rio Preserve

El Rio Preserve Nature Stroll (Late April)

9 – 10:30 a.m., April 23, 2026

Reconciliation Ecology Workshop Poster

Reconciliation Ecology Workshop: Trees | Taller de Ecologia: Arboles

8 – 10 a.m., April 25, 2026

A collection of images from the Sonoran Desert including cactus, birds, dragonfly and moon,

Signs of the Season Phenology Walk Late April

8 – 9 a.m., April 26, 2026

Image of the flowing Santa Cruz River

Living River Ramble April

9:30 – 10:30 a.m., April 26, 2026

Santa Cruz River Research Days words with green leaf

Santa Cruz River Research Days | Días de Investigación del Río Santa Cruz 2026

All Day, April 28 – 30, 2026

A collection of images from the Sonoran Desert including cactus, birds, dragonfly and moon,

Signs of the Season Phenology Walk Early May

7 – 8 a.m., May 3, 2026

Birding at El Rio Preserve New Event Image

Birding at El Rio Preserve (May)

7 – 9 a.m., May 5, 2026

Image of a phone with the camera pointing to a hummingbird. Text describes how this is a Smartphone Photography Walk.

Smartphone Photography Walk: El Rio Preserve (May)

7 – 9 a.m., May 6, 2026

Nature Stroll at El Rio New Event Image

El Rio Preserve Nature Stroll (Early May)

8 – 9:30 a.m., May 14, 2026

A collection of images from the Sonoran Desert including cactus, birds, dragonfly and moon,

Signs of the Season Phenology Walk Late May

7 – 8 a.m., May 17, 2026

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We respectfully acknowledge the University of Arizona is on the land and territories of Indigenous peoples. Today, Arizona is home to 22 federally recognized tribes, with Tucson being home to the O’odham and the Yaqui. The university strives to build sustainable relationships with sovereign Native Nations and Indigenous communities through education offerings, partnerships, and community service.

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