6:30 am - 10:00 am Labor Day Half Marathon 2021 September 6, 2021 @ 6:30 am - 10:00 am Labor Day Half Marathon 2021 Labor Day Mini Marathon September 6, 2021 Parker, CO
8:00 am - 12:00 pm Ned * Ned Half Marathon, 10K & 5K 2021 September 11, 2021 @ 8:00 am - 12:00 pm Ned * Ned Half Marathon, 10K & 5K 2021 NED* NED Half Marathon/10K/5K September 11th, 2021 Nederland, CO $35 – $70
9:00 am - 11:00 am Team Hope 5K – 2021 September 11, 2021 @ 9:00 am - 11:00 am Team Hope 5K – 2021 Heroes vs Villains 5K September 11, 2021 Denver, CO $15 – $40
7:00 am - 11:00 am Nun Run Half Marathon, 5K & 1 Mile 2021 September 12, 2021 @ 7:00 am - 11:00 am Nun Run Half Marathon, 5K & 1 Mile 2021 Nun Run DeKoevend Park Littleton, Colorado $30 – $60
8:00 am - 12:00 pm Second Wind Walk/Run 2021 September 25, 2021 @ 8:00 am - 12:00 pm Second Wind Walk/Run 2021 Second Wind Fund 5K September 25, 2021 Littleton, CO $25 – $30
7:30 am - 3:30 pm Castle Rock Trail Festival 2021 October 2, 2021 @ 7:30 am - 3:30 pm Castle Rock Trail Festival 2021 Castle Rock Trail Festival October 2nd, 2021 Castle Rock, Colorado $15 – $95