Kip there are some active Hobie 16 & 18 sailors in the Boise area and they belong to the local Southern Idaho Sailing Association ( http://www.idahosailing.com/ ). There is a Hobie Dealer in Boise at Boise Marine.

Dave I live in Hayden Idaho and yes there is a sailing club right next to you. Actually we are having a meeting this Jan 3rd in Spokane. We also just filed our application to become a Hobie Fleet. Check our website out at http://www.sail-s.com/main/sail/Sailing_Group/Sailing_Group_MAIN.htm
. Also a new Hobie dealership is opening in the area in May. As for our club we are not a big boat sailing club as our club boats range in size from 8 ft to 16 ft. No 18 ft + boats in our club yet. Our club boat length limit is 22 ft. There are two big boat clubs on Lake Pend Oreille and one on Lake Coeur d' Alene, so there are clubs and regattas for your big tri as well even though they are not very receptive to multihulls. I have a friend that sails a F24 on Lake Coeur d' Alene. As for Ice Sailing most of the small lakes will freeze over. The lake were our club is freezes over and you can drive on it - Hauser Lake, that is if it gets cold enough this year. Call me if you would like at 208-762-2382