They call Lake Tahoe the Big Blue, but it could just as well be called the 'Big See-Through Thing,' because the third-deepest and largest alpine lake in North America is undoubtedly among the clearest ...

LAKE TAHOE, Calif./Nev. – Chase Petley rummages through the tool laden shelves in his garage and proudly pulls out a cylinder marked by shattered glass. “This is one of my favorite failures,” he says.

Dipping my toes into Diamond Lake, I braced myself for the worst. Lakes throughout the Pacific Northwest take a long time to warm in the summer, and some of them, like the nearby 2,000-foot-deep ...