Hilly, humbling, and hard. The Hagg Lake Half Marathon, part of the 2021 Hagg Lake Triathlon & Trail Festival was all of these things. With Summer here and things beginning to open up more and more, I’ve had a lot of races on my plate, and I realize now that I really didn’t appropriately prepare for the challenge that the Hagg Lake Half brought me. There are a few things I think you should know…