Monday evening was breezy enough to raise some chop on Spy Pond. I walked with my wife through Spy Pond Park, parallel to the bike path, and we wondered at the foam along the water's edge. It reminded us of the problems caused by high-phosphate detergents when we were in junior high school, back in the day. But a check with my Facebook friends produced a natural explanation: tannins, probably from the many nearby oaks. One friend who's an avid hiker tells me he's often seen the effect in unpolluted mountain streams.
Spy Pond, Arlington
Today: 13 miles. This year: 670.5 miles.
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