Race Details

The "Grandfather" or maybe the "Godfather" of the ERS. This is the race that started it all, and the race that every runner must do if looking to put feet to dirt... (and cool off off by jumping in the reservoir)

September 8th, 2018, will see the 9th Annual Denver Trail Half Marathon and 10k, hit the trails once again at beautiful Cherry Creek State Park in Aurora, CO.  The race will start and finish on the West side of the park at Hobbie Hill, next to the marina. 

ERS events facebook page

Pre-Race Packet Pickup:
Friday September 7th, 2017

Race Day  Schedule:
6:00am-  Race Day Registration Opens
7:00am-  Expo Opens
7:30am-  Half Marathon Starts
7:50am-  10k Starts
8:00am-   Food Tent Opens
9:45am-   Kids Race Starts
10:15am- 10k  Awards
10:30am- Half Marathon Awards
11:00am- Expo Closes

Denver Trail Half Marathon and 10K

Photos from the Runners...

The Summer Series

September 8th, 2018

Race Schedule

Course Maps

Location: Cherry Creek State Park (West Entrance)

Address: Corner of S. Dayton and  Lake View Rd
              Greenwood Village, CO 80111

Date: September 8, 2018

Type of Terrain: Dirt Trail and Bike Path (For Approx %, please see Course Map links)


  • Limited Parking at Hobbie Hill (Event Site), about 75 parking spaces
    • ​Runners are responsible for the $7 Park Fee, if parking inside State Park
  • Additional Parking can be found at Cherry Creek High School (5 min walk)
    • Look for  Event Parking Signs           

​Course Notes:

  • Elevation gains of 200'-400', based on course distance
  • ​Out and Back Courses, great for all running levels
  • 4 Aid Stations for Half, 2 Aid Stations for 10K

For more detailed course information, maps, testimonials, and course images please see designated course maps.

Packet Pick Up Location:

Runners Roost Denver

1685 S. Colorado Blvd

Denver, CO 80222

FAQ's: Answers to FAQ'S for this event and other ERS events can be found HERE