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Yaqui Pass to Yaqui Ridge to Pinyon Ridge
A hike from Yaqui Pass over the crest of Yaqui Ridge to Pinyon Ridge reveals sweeping vistas into the desert and east towards the Salton Sea. To the north, you can see Coyote Mountain, the Santa Rosa ridge, San Ysidro Mountains, as well as the Borrego valley and the...
Santa Ana Dust Event
1/29/20 Dust Event Clark Dry Lake dust cloud due to Santa Ana winds that day.
Protected: Borrego Palm Grove Fire January 18, 2020 Regeneration Timeline
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Evaluating Particulate Matter Air Quality in Borrego Springs and Air Quality Salton Sea presentations 1-12-2020
Presentations available for download: - Air Quality Reduction Due to the Shrinking Salton Sea- An Overview and Case Studies of Particulate Matter Air Quality in Borrego Springs (Year 3) Report mentioned in the Salton Sea presentation: Pacific Institute page on the...
2019 Sheep Count Results
Citizen Science - Annual Bighorn Sheep Count 2019 Sheep Count (by year) Click on the dates by year below in order to download the full report.
Christmas Bird Count Results
The results are tallied! Download the Christmas Bird Count CBC results Noticeable short-term (last 3 years) population increases include Ring-necked Duck (29 to 82 birds), Northern Flicker (35 to 86), and American Robin having a big year (16 to 188). Conversely,...
127 days with 100 °F or more were recorded in the Borrego valley this year
127 days with 100 °F or more were recorded in the Borrego valley this year , logged by our weather station, part of the UCNRS Climate Monitoring Network, located at the Colorado Desert District Office park headquarters. Data from prior years can be found here:...
2018 Sheep count results
Sheep Count in Anza-Borrego Desert State Park. Thanks to all who participated.
Anza-Borrego Desert State Park mule deer family in Sentenac Cienega.
Anza-Borrego Desert State Park mule deer doe and fawn drinking water from a spring in Sentenac Cienega.

USD summer fieldwork conducting aquatic invertebrate surveys
Kate Boersma, Assistant professor at the University of San Diego has taken her students to the reserve and state park to conduct aquatic invertebrate surveys. Photos and a few captions from Kate's Twitter account reproduced below.