Running trips—from Utah's desert to Patagonia's peaks—offer the most thrilling (and humbling) adventures this writer's ever experienced.

But each U.S. state has such an embarrassment of riches, it’s almost impossible to see everything that’s worthwhile. Don’t ...

They’ve recently made headlines for interfering with boats, but intelligent, family-focused and remarkably long-lived orcas–better known as killer whales–contain multitudes.