By Michael Lanza
Warm, summer-like temperatures and mostly sunny skies greet us as we start hiking up the Williams Creek Trail in southwestern Colorado’s San Juan Mountains. Even in mid-September, the southern Rocky Mountains sun remains intense here, at over 9,000 feet. Its surprising warmth (compared to the northern Rockies) reminds me of days on the John Muir Trail or in Yosemite in August. But ominous clouds trot across the sky, some of them ripening to the color of a plum ready for picking, and the forecast calls for possible thunderstorms today and tomorrow.