The chief problem for the grasshopper, in terms of its status among fly fishers, is the mayfly. The mayfly — delicate, slender, standing quietly on a river, the soft peaks of its full wings angling high — is the insect that, to trout-stream fly fishers,...

When you drift down the Yellowstone in a wooden boat, you know it: The momentum is different. There’s a glide through the waves instead of a pull. On a July afternoon, it can smell like the trunk of a sun-warmed cedar. A wooden boat sounds...

Gnarled, rugged expanses of black and gray lava rock, dotted with muted green sagebrush, define Craters of the Moon National Monument and Preserve in eastern Idaho during snow-free seasons. Miles before reaching the visitor center, a field of hardened lava appears south of the highway,...

Just as surfers will spend the balance of their year waiting for just the right wave, and skiers will rearrange their lives in pursuit of fluffy mountain powder, so do ice boaters watch for fresh ice and stiff winds. They’re monitoring long- and short-term weather...

America’s entry to the Rocky Mountain fur trade closely followed a rapid succession of events: President Thomas Jefferson’s fervent advocacy for territorial expansion, the Louisiana Purchase (1803), and the Lewis and Clark expedition (1804–6), the latter of which reported extraordinary populations of beaver, buffalo, and...

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