Event details subject to change. Please confirm all information via event website.
RMRR Spring Marathon Training Series #1
Platte River Trailhead Park Colorado Blvd and E 88th Ave, ThorntonWeek of Events
Sunday, March 29, 2026
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March 29, 2026 -RMRR Spring Marathon Training Series #1
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March 29, 2026 -Equinox Half Marathon
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March 29, 2026 -Tortoise & Hare 12K
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March 29, 2026 -Splash & Dash III
RMRR Spring Marathon Training Series #1
These Marathon training races are geared towards people training for spring marathons. They are supported runs with aid stations and are timed and scored. There are both 10 mile and 20-mile distances for people who are training for either a half marathon or a full marathon. Come and join us for a fun, competitive training […]
Equinox Half Marathon
Both races start & finish at Sparge Brewing in Wellington 3999 GW Bush Unit 101, Wellington, CO 80549
Tortoise & Hare 12K
The Tortoise & Hare (T&H) is a low-key “handicap” series of seven races that are run monthly from October to April, typically on the first or second Sunday of the month. Computer-predicted times allow runners of all levels to compete equally. Runners start at staggered intervals with faster runners (Hares) trying to catch slower runners […]
Splash & Dash III
Join us for a Kids’ Splash & Dash Series this winter at the Louisville Rec Center! Get ready for a fun, energetic winter racing experience! Each event features an indoor swim in the Louisville Rec Center pool, followed by a run on the outdoor trail. In the case of bad weather, the run will move […]
Monday, March 30, 2026
No events on this day.
Tuesday, March 31, 2026
No events on this day.
Wednesday, April 1, 2026
No events on this day.
Thursday, April 2, 2026
No events on this day.
Friday, April 3, 2026
No events on this day.
Saturday, April 4, 2026
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April 4, 2026 -PPRR Nielson Challenge
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April 4, 2026 -Cayson Pearson Memorial 5K
PPRR Nielson Challenge
Race Format The first time you run this event, you'll establish a base time for yourself. This base time is used to generate a handicap time. The handicap time is calculated using an algorithm developed by Bob Royse, and it's geared to favor a beginning runner and the slower runners. Click here for an explanation of the […]
Cayson Pearson Memorial 5K
This annual fun run/walk (& knockout tournament if you also love basketball) is held each year to honor the memory of Cayson Pearson, award scholarships, raise funds for additional and future scholarships, and raise awareness for mental health & suicide prevention.
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