The Ralston Creek Half Marathon and 5K are back in 2023 and we are excited to announce the Racing Underground Winter Running Series also returns after a 2 year hiatus due to the COVID pandemic! Join us at Colorado's Premier Winter Half Marathon.
The Ralston Creek races feature a fun winter half-marathon and 5K run conveniently located on the west side of the Denver Metro Area in Arvada, Colorado. The courses covers a scenic mix of road and bike path over rolling terrain, and an optional early start time for half-marathon runners who expect to take more than 2.5 hours to complete the course!
7:30 a.m. - Packet Pick-Up Opens
9:00 a.m. - Wave-1 Start (half-marathon runners expecting to be on the course longer than 2 hours 45 minutes)
9:45 a.m. - Wave-2 Start (half-marathon runners expecting to take less than 2 hours 45 minutes)
10:00 a.m. - Wave-3 Start (all 5K runners)
10:45 a.m. - 5K Awards Presentation*
11:30 - Half-Marathon Top-3 Overall Awards Presentation*
1:30pm - Finish Line Cutoff
The Ralston Creek Half Marathon course follows a mix of roads and bike paths on the west side of Arvada. The opening 5 miles are fairly flat, with a barely noticeable gradual gain in elevation. Miles 5 through 6.5 are rolling, with one good climb leading to the high-point of the course atop Ralston Mesa at 7.75 miles. From there, the course is almost all downhill and flat to the finish, with the exception of a small bump around mile 9 and a very gradual uphill in the last half-mile.
Click Here for a Half-Marathon Course Map
Half-Marathon aid stations are located approximately every two miles throughout the course (approximate locations are: 2.25, 4.25, 6.5, 9.5, 11.5) All aid stations will have both water and Skratch energy drink. Hammer Gel will be available at miles 4.25 and 9.5.
The Ralston Creek 5K Run course follows a mix of roads and bike paths on the west side of Arvada. The route starts with a slight downhill in the opening mile, a flat second mile, and a very gradual uphill in the final mile. A single aid station will be located at approximately halfway into the 5K run.
Click Here for a 5K Course Map
Click Here for Registration