Curated races, clubs, and training

MarathonThe full 26.2 Half Marathon13.1 miles of fun 5KShort and fast 10KThe classic distance TrailGet off the pavement RoadPavement classics Ultra50K, 100K, and beyond FlatFast, PR-friendly courses DownhillNet elevation drop RelayRun as a team VirtualRun anywhere, anytime CoastalRun along the shoreline MountainHigh-altitude challenges

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

United StatesRaces across America Boston, MAHistoric running city New York, NYThe five boroughs Chicago, ILFlat and fast Los Angeles, CAWest coast running San Francisco, CAHills and views Denver, COMile high racing Portland, ORPacific Northwest Seattle, WAEmerald city runs Austin, TXTexas running scene Nashville, TNMusic city miles San Diego, CAYear-round sunshine Miami, FLTropical running Honolulu, HIIsland paradise runs Washington, DCMonument runs Salt Lake City, UTMountain valley racing Boulder, CORunner's paradise Bend, ORTrail town USA Asheville, NCBlue Ridge running Duluth, MNNorth Shore trails Charleston, SCSouthern charm runs Savannah, GALive oak lined routes Santa Fe, NMHigh desert art town Key West, FLSouthernmost runs Maui, HIVolcanic island trails Napa Valley, CAWine country running

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

Turkey TrotThanksgiving weekend runs New Year'sStart the year running July 4thIndependence Day runs Valentine'sRun with your sweetheart St. Patrick'sLucky runs in green HalloweenSpooky season runs Memorial DayHonor and run ChristmasHoliday season runs Labor DayEnd-of-summer runs Mother's DayRun for mom Father's DayRun for dad Cinco de MayoFiesta runs MLK DayDream runs

YosemiteSierra Nevada running Grand CanyonRim-to-rim adventures ZionRed canyon trails YellowstoneGeothermal wilderness Big SurCoastal California SedonaRed rock running MoabDesert ultra country Lake TahoeAlpine lake running AcadiaNortheast coastal trails GlacierCrown of the continent Death ValleyExtreme desert running Joshua TreeHigh desert trails Rocky MountainAlpine trail running OlympicRainforest to coast Bryce CanyonHoodoo trails Great Smoky MountainsAppalachian running LeadvilleRace across the sky Mount RainierVolcanic peak trails Pictured RocksGreat Lakes shoreline

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

About Pricing Brand Terms Privacy

© 2026 Intervals

Races Clubs Train Wrapped

WinterFest 5k & Fun Run — Thornton, CO

Races
United States
Colorado
Denver, CO
WinterFest 5k & Fun Run

5K Road Road 5K City Road City

WinterFest 5k & Fun Run

Saturday, December 12, 2026Thornton, CO1200m – 5K

Kick off the holiday season with a spirited run or walk at Thornton's Carpenter Park. Participants can choose between a chip-timed 5K or a shorter, untimed Fun Run/Walk perfect for all ages. The event celebrates the Best of Winter in Thornton, Colorado, with a festive atmosphere that extends well beyond the finish line. After your run, enjoy the holiday festival featuring ice skating, a holiday marketplace, and visits with Santa. Runners will also receive a festive collectible mug to enjoy a warm drink at the finish line. Cap off your race day by relaxing in the heated beer garden.

Races

Temperature

Cold

Area

City

Dec 1210:10 AM

$17

$20 after Oct 1

FAQ

Location

Dec 1210:10 AM

$17

$20 after Oct 1

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

3498 E 112th Ave

Thornton, CO 80233

More races near Thornton

2026 Short Run Long Day 5k Run/Walk 26th Annual

Traverse City Track Club Summer Series

Traverse City, MI

Twilight Run

SUMMER SOLSTICE 5K / 1 MILE

Worth Township, PA

DFW Burning Soles Trail Series Race 3

Flower Mound, TX

Ten Trails Active Club 5k Summer Series

Black Diamond, WA

Where the Fugowee?!

2026 Anchorage Mayor's Marathon & Half Marathon

26.2 Miles13.1 Miles4.7 Miles+1

$5 5K

Mountain Home, AR

Run for the Rancho 2026 - Rancho Las Virgenes NEW LOCATION

Coyote Kids Week 3

225 Yard Race1/4 Mile Race1/2 Mile Race+2

St. Albert the Great Church Viking Dash 5k 2026