Deb Love remembers the day well. June 12, 2006, was “the perfect Big Sky day,” she says, “sunny and beautiful.” Clouds drifted across a bright blue sky above the rustic lodge at Holland Lake—a popular summertime destination in the southeast corner of Montana’s Swan Valley. Gentle waves lapped the lakeshore, while east of the lake late-season snowfields marked the remote alpine basins and steep couloirs of the Swan Mountains.