What region in the U.S. saw a lawsuit filed in February 2026 by conservation groups against the Bureau of Land Management for reapproving a highway through critical habitat for the Mojave desert tortoise?

Conservation groups filed a lawsuit in February 2026 concerning a highway reapproval in Southern Utah, specifically targeting the proposed Northern Corridor Highway that would traverse the Red Cliffs National Conservation Area near St. George. This region is vital to the survival of the threatened Mojave desert tortoise, whose designated critical habitat lies directly in the path of the proposed four-lane roadway. The legal action was taken against the Bureau of Land Management and the U.S. Fish and Wildlife Service, challenging their January 2026 decision to reapprove the highway.

The Mojave desert tortoise, a federally protected threatened species, is known for its long lifespan, sometimes reaching 80 years, and its habit of spending up to 95% of its life underground. Roads pose a significant threat to these slow-moving reptiles, increasing the risk of vehicle collisions, and introducing noise, garbage, and artificial light into their habitat. The Red Cliffs National Conservation Area was established by Congress in 2009 to protect the area's unique wildlife, scenic beauty, and scientific value, making it a crucial refuge for the tortoise population in southwestern Utah.

This recent lawsuit is not the first challenge to the Northern Corridor Highway. The project has a long and contentious history, having been considered and halted multiple times over two decades due to concerns about wildlife, public safety, and legal compliance. Previous legal agreements and environmental analyses, including a 2024 study, have highlighted the highway's potential to increase wildfire risk, spread invasive plants, and permanently destroy critical tortoise habitat. Despite these findings and a December 2024 rejection of the proposal by the BLM and USFWS, the agencies reversed course in January 2026, leading to the current legal battle. Conservationists argue that this reapproval disregards previous scientific findings and violates several federal environmental laws, emphasizing the ongoing commitment to protecting this unique desert ecosystem and its vulnerable inhabitants.