The deliberate slaughter of bison straying from Yellowstone National Park - killed because the brucellosis they may carry might endanger livestock - provokes a storm of protest, and calls into question the concept of wildlife management in the park.
The proposed widening and straightening of Highway 14-16-20, the link between Cody, Wyo., and Yellowstone National Park, raises tremendous controversy between tourism boosters and environmentalist critics.
Building the newest addition to Colorado's hut system for skiers and hikers meant long, cold hours of work at 11,300 feet in the Gore Range.
The FAA bans all commercial overflights of Colorado's Rocky Mountain National Park without much opposition.
Higher entrance fees at Yellowstone won't necessarily keep the park open, because the money needs to go to repair roads and buildings, park officials warn.
Environmentalists and Native Americans object to a proposed Park Service management plan that would develop bike and horse trails in New Mexico's Petroglyph National Monument.
The FAA's new rules for overflights at Grand Canyon will not ease the noise problem at all, critics say.
Musician Paul Winter decries the growth in aircraft noise in the Grand Canyon since he first recorded music in the park 30 years ago.
River guides and outfitters protest new drug-testing requirements begun in Grand Canyon National Park and soon to come to Utah's Canyonlands and Dinosaur National Monument.
"Teaming with Wildlife," a proposal to raise money for wildlife conservation and outdoor recreation by adding a small change to the cost of bird-seed, kayaks, hiking boots, etc., faces opposition from both the left and right.
Tread Lightly! tries to rein in reckless ORV advertising that glorifies the vehicles ripping up the land.
Well-organized and well-heeled, off-road vehicle users constitute a large and powerful group aiming to stake its claim to the West's public lands.
The Utah trial of eight North Star employees in the death of Arizona teenager Aaron Bacon on a "tough-love" wilderness program ends with only the field instructor, Craig Fisher, guilty as charged.
The Telluride Ski and Golf Company is allowed to double the size of its skiing area, but must pay a fine and restore 19 acres to wetlands near the resort.
The Forest Service bans jetboats from Hells Canyon for 21 days each summer on a 21-mile stretch of the Snake River.
Oregon Caves National Monument says the surrounding Siskiyou National Forest is injuring the caves by logging, mining and grazing.
One-third of Grand Canyon air-tour operators are breaking the law by not reporting flights or paying required fees.