I did the half in June. This year weather was literally perfect. Rainy cold and windy on the days prior to the race, but sunny, warm and a little wind on race day. I think it hit low 80’s by the afternoon.
Swim, rolling start, with signs to help seed you by time (sub :30, 30-34 mins, etc). Water was pretty calm for CDA, at least until the far turn bouys further out into the lake. A little rolly for about 200-300 yards, but that’s it. I’ve swum in this lake multiple times for races, and the water was the best I’ve ever experienced.
Transitions are somewhat long.
Bike, out and back along lake is rolling but fast for the first 14, then you head up the highway on Mica grade, which climbs for several miles, then drops, then climbs again to basically the turn around at mile 35. There are some flat spots and downhills from which to recover and rebuild speed on the way up. The bulk of the 2800 feet of climbing (1900 or so) is done in this section, the first 35 miles. This year we had a slight tailwind / cross wind going up. Once you hit the turnaround there is lots of fast downhill. This, however, was when you is realized you had a tailwind going up, and now have a slight headwind on the way down. The backside climb up Mica is kinda a bummer, long climb ending around mile 48, but then a big downhill and flat to the finish.
The run is 2 loops, nothing special, one minor hill around mile 3 (go down, back up at mile 4). Tons of specatator support in the park when you finish lap one and start lap 2. The finish is fun. Huge crowds the last .5 mile to the finish.
I live in Boise, and am doing this race again, since we lost our 70.3 last year. Great race, course, town.
So less climbing that St. George or WF for sure. Definitely not flat.