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Lake Koocanusa by Libby Dam in northwest Montana. (Lisa Kyle Young / Getty Images)
Press Release: Victory April 9, 2026

Court Upholds Selenium Water Quality Standard for Lake Koocanusa

Montana and Idaho waters endure harmful pollution from upstream Canadian coal mines

document April 9, 2026

Selenium MSJ Order

A Montana District Court upheld Montana’s selenium water quality standard for Lake Koocanusa (Koocanusa Reservoir), affirming the science-based limits necessary to protect fish and other aquatic life.

The Cabinet Mountains Wilderness. (Eric Ian for Earthjustice)
Press Release March 31, 2026

Groups Challenge Trump Admin’s Rushed Approval of Cabinet Mountains Mining Project

Organizations fear harm to waters, wilderness area, and ESA-protected species

document March 31, 2026

Quotes from Plaintiffs in Montanore Litigation

A coalition of local and national organizations filed suit over the Trump administration’s fast-tracked approval of the Libby Exploration Project in northwestern Montana’s Cabinet Mountains.

document March 31, 2026

Libby Exploration Project Complaint

A coalition of local and national organizations filed suit over the Trump administration’s fast-tracked approval of the Libby Exploration Project in northwestern Montana’s Cabinet Mountains.

A male greater sage-grouse performs a spring courtship ritual in Carbon County, Wyoming. (Noppadol Paothong)
Press Release March 26, 2026

Lawsuit Filed Over Trump Administration Abandonment of Sage-Grouse Protections

Suit claims Bureau of Land Management walked away from 2015 commitments to sage-grouse to benefit oil and gas industry

The Flathead National Forest in Montana. (Your Forests Your Future / U.S. Forest Service)
Press Release March 24, 2026

Groups Intend to Sue Trump Administration Over Flathead National Forest Timber Project

60-day notice states recently-approved West Reservoir Project could harm grizzly bears and bull trout

document March 24, 2026

Flathead 60 Day Notice

Swan View Coalition and Friends of the Wild Swan notified the Trump administration of their intent to sue over the recently-approved West Reservoir timber project in Flathead National Forest, which would allow for new roadbuilding that could harm federally-protected grizzly bears and bull trout.

An expansive view of the Bull Mountains in Montana. (Northern Plains Resource Council)
Press Release March 23, 2026

Montana Groups File Appeal Over Bull Mountains Coal Mine AM6 Expansion

Groups claim Montana DEQ failed to analyze impacts to, water, agriculture, wildlife, climate and the community

document March 23, 2026

Bull Mountains AM6 Expansion Appeal

Several Montana groups appealed a District Court decision that failed to address the harmful impacts of the Bull Mountains Coal Mine’s AM6 expansion.

Press Release March 11, 2026

Groups Challenge Montana PSC Order That Shields Data Center Plans from Public View

Public has right to know NorthWestern’s data center plans under state constitution

document March 11, 2026

NorthWestern Data Center Protective Order Challenge

Community, conservation, and Indigenous-led organizations challenged a Montana Public Service Commission protective order that shields NorthWestern Energy’s letters of intent to provide electricity service to data centers from public view.

Press Release March 3, 2026

Lawsuit Challenges Montana’s Bull Mountains Coal Mine Expansion, Trump’s Sham Energy Emergency

Federal agency rammed through expansion, illegally skipped environmental analysis, shut out public

document March 3, 2026

Bull Mountains Coal Mine Complaint

Conservation groups sued the Trump administration over its approval of a major expansion of the Bull Mountains Coal Mine in Montana.

A bison grazes at American Prairie.
(Ami Vitale for Earthjustice)
Press Release February 6, 2026

American Prairie Challenges BLM’s Proposed Revocation of Bison Grazing Permits

The administration’s proposal sets a dangerous precedent on public land management, reversing longstanding practice

document February 6, 2026

American Prairie Protest

American Prairie challenged a U.S. Bureau of Land Management (BLM) proposal that, if approved, will revoke grazing permits used to sustain the group’s bison herd in north-central Montana.

document January 26, 2026

Montana Regional Haze Petition

The National Parks Conservation Association, Montana Environmental Information Center and Sierra Club filed a challenge to EPA’s approval of Montana’s “regional haze” plan.

Elk in the Rapid River Roadless area in Idaho’s Nez Perce National Forest. (John McCarthy / The Wilderness Society)
feature January 5, 2026

Timeline of the Roadless Rule

A timeline of the creation of and 25-year fight to defend the National Forest Roadless Area Conservation Policy.