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Welcome to the 14th Annual Platte River Half-Marathon and Buckhorn Exchange Relay, benefitting the Leukemia and Lymphoma Society. This point to point course is certified by USATF and has been recognized as Competitor Magazine's Best Half-Marathon and Post-Race Party and Colorado Runner Magazine's Best Half-Marathon and Best Post-Race Party.  The race will begin at the intersection of Alamo Ave. and Prince Streets next to the Downtown Littleton Light Rail Station and run through the streets of Littleton before joining the Platte River Trail to run 10 miles downstream to Denver. The course will leave the trail for the final 1.1 miles at 8th Avenue and head east over the 8th Avenue Viaduct to the finish at the Buckhorn Exchange at 10th Avenue and Osage Street. There is an approximate net elevation drop of 120 feet with only one uphill section on the course from 12 to 12 ½ miles as you cross the 8th Avenue Viaduct. The surface throughout the race is asphalt and concrete with over 50% of the trail adjacent to the course consisting of dirt and crushed gravel.

Along with a fast course each participant will receive a long sleeve technical shirt with this year’s race logo and a finishers medal. This year’s expanded post-race meal will be provided to all race participants and includes hamburgers, breakfast burritos, rice and beans, chili, potato chips, pickles, fruit, cookies, ice cream, beer and various other drinks. Live music will be provided at the post-race party. After your race and lunch you will be provided a ticket on the RTD Light Rail for return transportation to the Downtown Littleton Station. The Light Rail Station at 10thAvenue and Osage Street is just steps away from the finish line and post-race party.

Registration fees

Half Marathon Closed

Registration closed
    1. $50.00
      Oct 29 – Nov 2
    2. $60.00
      Nov 3 – Jan 3
    3. $70.00
      Jan 4 – Feb 29
    4. $80.00
      Mar 1 – Mar 31
    5. $90.00
      Apr 1 – Apr 8

Relay Closed

Registration closed
    1. Closed
      Oct 29 – Oct 30
    2. $105.00
      Oct 31 – Nov 2
    3. $120.00
      Nov 3 – Jan 3
    4. $135.00
      Jan 4 – Feb 29
    5. $150.00
      Mar 1 – Mar 31
    6. $165.00
      Apr 1 – Apr 8

Race Day Packet Pickup

Race day packet pick-up will be available from 6:30 a.m. until 7:45 a.m. at the large tent located in the northwest corner of the Littleton RTD parking lot on the corner of Alamo Ave. and Prince St. in Downtown Littleton. Allow extra time to park and pick up you race packet.

Course Information

The starting line is located in Downtown Littleton on Prince Street between Alamo Avenue and Church Avenue.  The address is approximately 5850 South Prince Street, Littleton, CO  80120

The finish line will be on Mariposa Street near 10th Avenue in Denver, CO  The address is approximately 980 Mariposa Street, Denver, CO  80204.

The post-race celebration is at the Buckhorn Exchange Restaurant located at 10th Avenue and Osage Street in Denver two blocks west of the finish.

Relay Exchange Points

The relay will consist of three legs of 5 miles, 5 miles and 3.1 miles.  The first exchange point is at the Englewood Golf Course just north of Oxford Ave.  Take Santa Fe Drive north to Oxford Avenue.  Go west on Oxford Avenue.  Utilize the parking lot on the north side of Oxford Avenue on the west side of the Platte River.  A volunteer will direct the 2nd runner to the 5-mile marker.

The second exchange point is located near Vanderbilt Park in Denver.  Take Santa Fe Drive north to Alameda Avenue.  Go west on Alameda, crossing I-25.  Turn left onto South Platte River Drive.  South Platte River Drive will turn into Jason Street.   Follow Jason Street south until you reach Exposition Avenue.  Turn left on Exposition.

Event Schedule

  • April 10 8:00 AM MDT - Half Marathon and Relay Begins

Contact Information

Event Location

Littleton, CO, United States

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