5K Run starts and ends at Pioneer Park in Billings, MT, followed by a kids fun run (one loop around the park). This race is put on by the Yellowstone Rim Runners (YRR). Your race fee includes a one year membership in YRR, which is an RRCA Club. Every year, we get bigger and better than ever before! New for 2018, YRR will be donating a portion of the Shamrock net proceeds to MSU Billings and RMC for their respective men's and women's distance running programs. Our target amount is $2500 to each school. So, sign up now and celebrate the start of road racing season and membership to a great club! See you at the park! Costumes are encouraged!