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Cache is a small plastic tube attached to a magnet. It is above the snow line.
When I was visiting Wisconsion I found a pair of caches from the HHAA, Hydrant series placed by HudsonHotAirAffair. I had a thought back then that if I ever hid caches I should have some Haha Hydrant caches of my own. Cache will be a quick and easy find.
(No hints available.)