Constructed Wetlands for Treatment of Mine Drainage: http://www.enviromine.com/wetlands/Welcome.htm
Discusses the use of using treatment wetlands to mitigate mine drainage in coal and metals mines. Details of design, treatment, and chemistry.

Greater Yellowstone Coalition: http://www.greateryellowstone.org/
Homepage for the GYC. Interesting and informative regarding Yellowstone National Park and surrounding area.

Idaho Conservation Data Center: http://www2.state.id.us/fishgame/info/cdc/cdc.htm
The central repository for information related to the state's rare plant and animal populations.

Idaho Watersheds Project: http://www.idahowatersheds.org/
This group uses it's web site to help protect Idaho school endowment lands, and all other public lands that lie on Idaho watersheds which have been degraded by livestock abuse. Good photo archives.

Jackson Hole Conservation Alliance: http://www.jhalliance.com/
The Jackson Hole Conservation Alliance works to protect the natural resources of Jackson Hole by monitoring the impacts of growth and development on public and private lands in and around the valley.

Oregon Natural Desert Association: http://www.teleport.com/~onda/
Web site for the protection of Oregon's native deserts.

Ralph Maughan's Wildlife Reports: http://www.forwolves.org/ralph/
Updates on the Yellowstone and central Idaho wolf reintroduction, wolf country conservation news and much more.

Sawtooth Wildlife Council: http://www.desktop.org/swc
....link doesn't work, search for SWC in progress - gwA non-profit organization dedicated to the conservation of Idaho's wildlife, salmon and steelhead, and resident fisheries located in Stanley, Idaho in the Sawtooth National Recreation Area.

State of the Land: http://www.nhq.nrcs.usda.gov/land/home.htm
A USDA site devoted to soil and environmental quality.

The Land Degradation Page: http://www.nhq.nrcs.usda.gov/WSR/Landdeg/papers.htm
A site discussing what happens when bad things happen to good soil.

The Nature Conservancy: http://nature.org/

The Wilderness Society: http://www.wilderness.org/