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Platte River Half-Marathon, Relay & 5k

Name: Platte River Half-Marathon, Relay & 5k
Start: 2027-04-11
End: 2027-04-11
Location: Littleton

Littleton, Colorado, United States

calendar_today 11 Apr, 2027

directions_run Running

language Official Website

sell $40.00 – $155.00

About the Event

Welcome to the Platte River Half Marathon, Relay & 5k race, one of the most exciting and popular races in the Denver Metro Area! This race is held annually in Littleton, CO. We’re thrilled to announce that registration for our upcoming 2027 event on Sunday, April 11th is open for the half-marathon and relay race. The race starts and finishes next to the beautiful Platte River Trail and adjacent to the popular Breckenridge Brewery campus. Join us for an epic post-race party at the Brewery with food, vendors, live music, and of course beer!

Whether you’re an experienced runner looking to set a new PR, a newcomer looking to tackle your first half-marathon, or a team of runners wanting to run an exciting relay race, join us for a day of adrenaline-pumping running, scenic views, and all-around fun. What’s more, we donate a portion of the proceeds to Salute Colorado. Thank you for your support, and we can’t wait to see you at the finish line!

Questions? Visit our race website here.

Entry fees are non-refundable and non-transferable. There are no deferrals to future years.

Races Offered

Half Marathon

Apr 11, 2027

straighten

Distance — 21.1K

terrain

Type — Running

timer

07:00

sell

$70.00

Half Marathon Relay

Apr 11, 2027

straighten

Distance — 21.1K

terrain

Type — Running

timer

07:00

sell

$155.00

5k

Apr 11, 2027

straighten

Distance — 5K

terrain

Type — Running

timer

07:15

sell

$40.00

Weather History

These values represent the 3-year monthly averages for April in Littleton.

thermostat Temperature

0.9° / 17.0°

wb_sunny Feels like

-3.4° / 12.5°

light_mode Avg sunshine hours

10h 31m

water_drop Avg rainfall

1.4 mm

ac_unit Avg snowfall

8.5 cm

air Avg wind speed

9.5 km/h (Light breeze)

opacity Sweat loss rate

Low

terrain Course conditions

Snow and ice expected

sunny Max UV Index

Moderate (5.0)

humidity_mid Humidity

48.9%

wb_twilight Sunrise

06:20

nightlight Sunset

19:38

About Littleton

Learn more about the host city, Littleton.

Littleton is a city of about 45,000 in the Denver Metropolitan Area of the western U.S. state of Colorado. The seat of Arapahoe County and also extending into adjacent Arapahoe and Douglas counties, the city lies south of Denver along the South Platte River. A former farming community, Littleton is now a residential suburb of Denver.