Colorado

Case: Center for Biological Diversity, Gallatin Wildlife Association, Great Old Broads for Wilderness, Rocky Mountain Wild, Sierra Club, Western Watersheds Project, and WildEarth Guardians vs. Bureau of Land Management

March 2, 2026 — Advocates for the West and our conservation partners sued the Bureau of Land Management to challenge its final plans governing greater sage-grouse management across 71 million acres of federal public lands in nine Western states. The lawsuit covers the dwindling species’ habitat in Montana, Idaho, Colorado, North Dakota, South Dakota, Nevada, […]

Case: The Wilderness Society v. U.S. Department of the Interior, U.S. Bureau of Land Management, and U.S. Department of Housing and Urban Development

January 6, 2026 — Representing The Wilderness Society, Advocates for the West filed a federal lawsuit seeking to compel the U.S. Department of the Interior (DOI), the Bureau of Land Management (BLM), and the Department of Housing and Urban Development (HUD) to release records related to a joint federal initiative targeting the sale of public lands […]

Case: States of Utah and Wyoming v. Deb Haaland, Southern Utah Wilderness Alliance, Conservation Lands Foundation, and The Wilderness Society

October 1, 2024 — Advocates for the West and our partners at Conservation Lands Foundation, The Wilderness Society, and Southern Utah Wilderness Alliance filed a motion to intervene to defend BLM’s Public Lands Rule against yet another lawsuit brought this past summer by the American Farm Bureau and other industry trade associations representing the oil […]

Case: Center for Biological Diversity v. Keith E. Berger, in his official capacity as Field Manager for the U.S. Bureau of land Management's Royal Gorge Field Office, and Bureau of Land Management

August 14, 2026 — Advocates for the West filed our opening brief on appeal with the U.S. Court of Appeals for the Tenth Circuit, challenging the BLM’s failure to require basic environmental safeguards in the extraction of federal minerals, and asking the Court to reverse the district court’s judgment and remand the case for further […]

Case: Public Employees for Environmental Responsibility and Western Watersheds Project v. Debra Haaland, Tracy Stone-Manning, and U.S. Bureau of Land Management

September 13, 2023 — Advocates for the West filed suit in the U.S. District Court for the District of Columbia against the Bureau of Land Management (BLM) for its failure to abide by the Federal Land Policy and Management Act to determine the prioritization and timing of environmental analyses for livestock grazing allotments on public […]

Case: Western Slope Conservation Center, The Wilderness Society, and Wilderness Workshop v. U.S. Bureau of Land Management, David Bernhardt, and Jamie E. Connell

October 17, 2022 — Advocates for the West reached a settlement agreement with the BLM that prevents the issuance of new oil and gas leases for lands in the Uncompahgre planning area until the agency conducts a more thorough environmental analysis and develops an amended plan. Under the agreement, the BLM must reconsider the eligibility of lands open to oil and […]

Case: WildEarth Guardians and Western Watersheds Project V. U.S. Forest Service

April 3, 2026 — A Colorado federal judge reinforced a major conservation victory for bighorn sheep conservation on the Rio Grande National Forest. The court granted a motion to remand the decision to create the Wishbone Allotment back to the U.S. Forest Service, requiring thorough assessment before domestic sheep grazing can be authorized on the allotment. In […]

Case: Western Watersheds Project, WildEarth Guardians, Center for Biological Diversity and Prairie Hills Audubon Society v. David Bernhardt, Joseph R. Balash, Bureau of Land Management, and U.S. Forest Service

February 11, 2021 – U.S. District Judge Lynn Winmill ruled strongly in our favor on this case, overturning a Trump Administration decision to strip protections from 10 million acres, mostly in Nevada and Idaho, to allow mining in critical habitat for greater sage-grouse. The court upheld our claim that the BLM failed to provide a […]

Case: Protest of the Proposed Decision to Issue Ten-Year Term Grazing Permits for Yellow Jacket and Flodine Park allotments in Canyon of the Ancients National Monument

September 15, 2015 — the BLM published a letter announcing that after “considering the protests received on this grazing decision the BLM has determined that further analysis is warranted” before issuing 10-year term grazing permits for the Flodine Park and Yellow Jacket Allotments in Canyon of the Ancients National Monument. Instead, an Environmental Assessment regarding […]

Case: Intent to Sue Over Violations of Section 4 of the Endangered Species Act

September 27, 2018 — A federal court decision preserves the listing status for Gunnison sage-grouse as a threatened species, with the critical habitat the U.S. Fish & Wildlife Service designated for it intact. Fewer than 3,000 of this unique sage-grouse species remain, clustered around Colorado’s Gunnison Basin. Advocates for the West represented WildEarth Guardians and […]