- Kristin has an undergraduate degree in Sports Science from the University of Idaho, where she is an alumna of the Kappa Kappa Gamma sorority.
- She was born into a military family and spent her early childhood in Tennessee, California and overseas before attending high school in Japan.
- In September 2012, Armstrong's U.S. Olympic gold medal winning time trial bike was stolen while in transit between Germany and the USA. Her bike sponsor Felt and component sponsor SRAM presented her with a replica replacement at the 2013 AMGEN Tour of California.
- She is employed by St. Luke’s Health System as the Community Health Director with a vision to help make Boise become one of the healthiest communities to live in.
- One of her favorite things to do outside of training is going camping with family and friends.