When I lived up there my go to daily ride was to climb up through Lone Pine State Park on the western edge of Kalispell then connect via a short road section to the Herron Park trail complex. There are miles and miles of singletrack up there that connect all the way to the Blacktail ski area. One group that used to be very active and may still be is 'foys to blacktail'. They were acquiring access and building trails when I was there in '05-'07.
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