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5KShort and fast 10KThe classic distance Half Marathon13.1 miles of fun MarathonThe full 26.2 50KYour first ultra 50 MileThe long haul 100KUltimate endurance 100 MileThe ultimate challenge

All trail racesGet off the pavement Mountain TrailsAlpine singletrack Coastal TrailsOcean views on foot Hilly TrailsRolling terrain off-road Flat TrailsSmooth and fast off-road Trail Ultras50K+ off-road Trail 50KFirst ultra on dirt Trail Marathon26.2 off-road Trail Half13.1 off-road

All road racesPavement classics Road MarathonClassic 26.2 on pavement Road Half13.1 on the roads Road 10K6.2 miles on pavement Road 5KFast 3.1 on the roads Flat RoadPR-friendly road courses Downhill RoadNet downhill road courses City RoadUrban road events

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FlatFast, PR-friendly courses RollingGentle hills throughout HillySignificant climbs MountainousMajor elevation challenges DownhillNet elevation drop CoastalRun along the shoreline MountainHigh-altitude challenges ValleyBetween the peaks IslandSurrounded by water CanyonDeep and dramatic DesertArid and exposed

OceanRun along the ocean LakePeaceful lake views RiverFollow the water BayHarbor and bay views WildernessDeep backcountry RuralQuiet country roads CityUrban energy LoopStart and finish together Point to PointA to B adventures Out & BackThere and back again

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RelayRun as a team VirtualRun anywhere, anytime WalkingWalk-friendly events TrackOn the oval GrassSoft underfoot SandBeach running MixedVariety of terrain LapsMultiple loops

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Races Clubs Train Wrapped

BRR All-Comers Summer Track & Field Series #4

Races
United States
Colorado
Boulder, CO
BRR All-Comers Summer Track & Field Series #4

Ultra 100 Mile Road

BRR All-Comers Summer Track & Field Series #4

Thursday, July 23, 2026Boulder, CO200m – 100M

Registration open8 weeks

Fun for all, from newcomers of any age racing for the first time to veteran competitors looking to test their fitness, all in a friendly, welcoming environment. We are back at CU Potts Field again offering a full schedule of events. BRR Members Save $5 off adult pricing! Use the email address associated with your membership. Non-Members can easily join in the registration process to immediately save.

Races

Jul 236:00 PM

24 spots

$20

Jul 236:00 PM

24 spots

$20

Not affiliated with this event. Official website. We may earn a commission on registrations.

Location

CU Potts Field

Boulder, CO 80303

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