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

2026 Lake Chabot Trail Challenge (Half Marathon &…

Races
United States
California
Oakland, CA
2026 Lake Chabot Trail Challenge (Half Marathon & 5K)

Half Marathon 5K Trail Hilly Trails Trail Half

2026 Lake Chabot Trail Challenge (Half Marathon & 5K)

Sunday, June 7, 2026Castro Valley, CA5K – Half Marathon

The Lake Chabot Trail Challenge returns for its 42nd annual running, offering a classic test for trail enthusiasts in the Bay Area. The half marathon features a scenic, hilly loop primarily on dirt fire roads, rewarding runners with sweeping ridge-line views of Lake Chabot, grassy slopes, and eucalyptus groves. On clear days, participants can even spot Mt. Diablo and the San Francisco Bay from the course. For those seeking a shorter challenge, the 5K offers an out-and-back route with gentle rolling hills on mostly paved surfaces. Both distances provide a quintessential Northern California outd...

Races

Surface

Road

Terrain

Rolling

Layout

Out & Back

Temperature

Mild

Setting

Hills

Waterfront

Lake

Area

City

Jun 78:30 AM

Shirt, Medal

Closed

FAQ

Jun 78:30 AM

Shirt, Medal

Closed

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

Location

17404 Lake Chabot Road

Castro Valley, CA 94546

More races near Castro Valley

2026 Acadia Half Marathon and 10K

Twin Lobster Half Marathon

Fire Tower Trail Races

Cross River, NY

Run for Breast Cancer 5K/10K/13.1 NEW JERSEY

5K10K13.1 Miles+1

Run for Breast Cancer 5K/10K/13.1 PHILADELPHIA

5K10K13.1 Miles+1

SuperHeroes Run 5K/10K/13.1 NEW JERSEY

5K10K13.1 Miles+1

SuperHeroes Run 5K/10K/13.1 PHILADELPHIA

5K10K13.1 Miles+1

Medal Madness 5K, 10K, & 13.1M at Mobile, AL (23)

5K10K13.1 Miles

Medal Madness 5K, 10K, & 13.1M at Piedmont, AL (23)

5K10K13.1 Miles

Medal Madness 5K, 10K, & 13.1M at Fort Smith, AR (23)

5K10K13.1 Miles

Medal Madness 5K, 10K, & 13.1M at Springdale, AR (23)

5K10K13.1 Miles

Run for Breast Cancer 5K/10K/13.1 PHOENIX

5K10K13.1 Miles+1