Weak upper trough in WNW flow at least brought us bit -SN today for our Parkside trail run in Rock Crk. Canyon, SW of town. Start around 2200m then just gradually ascends. Dropped to 0C w fresh W wind, felt great. No moose sign, they must know it is hunting season. Huge summer-like upper ridge re-builds over wrn US this weekend/early next week. Only past few years seen that kind of ridging this late. 428ppm CO2, what will it be like at 450? #climate #running #dogsofmastodon #montana #mountains

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