Ralston Creek Half-Marathon
& 5K Run

February 8, 2015
Arvada, Colorado

Due to a surge of late entries,
shirts will not be included with entries received after 9am on February 4th.

There will be no race-day registration

2015 Current Entry List
Will be posted on Wednesday evening

The Ralston Creek Half Marathon and 5K returns in 2015, after sold out fields in the half for the past 3 years! Join us at Colorado's Premier Winter Half Marathon, and the finale to the 2014-2015 Racing Underground winter running series.

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 a separate early start time for half-marathon runners who expect to take more than 2.5 hours to complete the course!


HALF-MARATHON COURSE: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, 5.75, 7.25, 9.5, 11.5) All aid stations will have both water and HEED energy drink. Hammer Gel will be available at miles 4.25 and 9.5.

5K COURSE: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


The Ralston Creek Half Marathon and 5K will offer a three wave start. Wave-1 will start at 9:00am for half-marathon runners who plan to take longer than 2.5 hours to complete the course. Wave-2 will start at 9:45am for half-marathon runners who plan to take less than 2.5 hours to complete the course. Wave-3 will start at 10:00am for all 5K runners.

This start procedure is designed to improve the finish line and post-race experience for the slower runners. The 45 minute gap in start times will allow the wave-1 runners time to spread out on the course before the faster runners begin. This start procedure is a runner favorite! Please be aware: runners starting in wave-1 who finish the race faster than 2:15 will be removed from the results and disqualified. Wave starts are timed so returning wave-1 runners and outbound wave-2 runners do not have to share the path. Please select the appropriate wave for your ability level. If you are not sure, please select wave-2.

A 2:30 half marathon time is roughly an 11-minute and 30 seconds per mile pace.

  • 7:30 a.m. - Packet Pick-Up Opens
  • 9:00 a.m. - Wave-1 Start (half-marathon runners expecting to take more than 2.5 hours)
  • 9:45 a.m. - Wave-2 Start (half-marathon runners expecting to take less than 2.5 hours)
  • 10:00 a.m. - Wave-3 Start (all 5K runners)
  • 11:00 a.m. - 5K Awards Presentation*
  • 11:30 - Half-Marathon Top-3 Overall Awards Presentation*

  • Overall Awards will be based on GUN TIME

  • Half-Marathon Age-Group Awards will be based on NET TIME, and will be presented in several ceremonies, on a rolling basis after 11:30 as award categories fill. You may also opt to skip the awards presentation, and simply stop by the awards tent to pick up your age group award if awards for your category have been confirmed. The awards tent will receive updated awards lists throughout the morning.

  • Raffle prizes will be presented at the finish line to random finishers. It is winter, after all! We're not going to ask you to wait around to see if you won something!

*Awards for overall top-3 will be determined by GUN TIME for both the 5K and the half marathon. Age Group awards for both races will be based on NET TIME. The scheduled time for the awards presentation may be moved a bit depending on weather and number of athletes still on course

INFORMATION: Most questions are answered right here on the race website. If you have a question that isn't answered here, call Darrin or Jill at 303-642-7917, or shoot us an email at darrin@racingunderground.com


Half-Marathon entry is limited to the first 650 registrations. 5K registration is limited to the first 750 entries. Once a distance has filled, we cannot accept any additional entries.

Your entry fee includes entry into the race, a finisher's medal (for half-marathon runners who complete the course), fun music, a racer goody bag, hot cocoa and tasty post-race food, entry into our sponsor merchandise drawing, and if you are one of the speedy guys or gals up front in the half-marathon, you may take home a bit of cash!!!

Click button below to register (Registration will close at Noon on Saturday February 7th)

Due to a surge of late entries,
shirts will not be included with entries received after 9am on February 4th.


  • 5K Run
    • $30 through January 23rd
    • $35 from January 24 - February 7th
    • Youth age 12 & under pay just $20 pre-reg. for the 5K
  • Half Marathon
    • $55 through November 15th
    • $65 from November 16 - January 23
    • $70 from January 24 - February 7th

Races will be held, regardless of weather conditions, however we reserve the right to alter or shorten the course in the case of extreme weather. Once accepted, entry fees will not be issued for any reason. You may transfer your Ralston Creek or full series entry to another runner for a $10 fee until 7 days before the first event. No transfers will be allowed fewer than 7 days before the event. No refunds will be issued if the race is shortened, postponed, or cancelled due to weather.


PACKET PICK-UP: We will be offering two packet pick-up options in 2015!

EARLY PACKET PICKUP will be held at
Runners Roost Lakewood on Thursday February 5th from noon until 7pm. Runners Roost will have some great deals during packet pickup, so come ready to shop!!! Friends or family members will be allowed to pick up for you at early packet pickup as long as they have a signed note from you allowing them to pick it up on your behalf.

RACE MORNING PACKET PICKUP: You may also pick up your packet on race morning immediately adjacent to the finish line beginning at 7:30am. Race morning packet pickup will remain open until 9:45am.

Your packet will include your official Ralston Creek bib number with timing chip attached, goody bag, and race shirt.

Your timing chip will be attached to the back of your bib number. You must wear your bib number VISIBLY on the FRONT in order to receive a finish time and place. If your bib number is under your clothing you will not receive a finish time. Also, please DO NOT FOLD OR CRUMPLE YOUR BIB NUMBER. If the attached timing chip is damaged, it will not work.

DIRECTIONS: The Ralston Creek Half-Marathon is conveniently located on the Arvada's west side. From Highway 93 (between Golden and Boulder), turn east on the 64th Ave Parkway. Drive east on 64th for approximately 3.5 miles. As you pass the Arvada West shopping center (on your left) you will turn left onto Gardenia. Take Gardenia 2 blocks to W. 65th Way. The race staging area will be to your right.

***For directions from your house, just click the "View Larger Map" link below the map to the right. Click "Directions" on the left side of the larger map page, and you can enter your home address for turn-by-turn directions.

View Larger Map


We'll have plenty of hot cocoa and tasty post-race food at the finish line to warm you up and fill your belly, including breakfast burritos from El Senor Sol Mexican restaurant! And hopefully you'll also be one of the lucky participants who walks away with some sponsor schwag in our post race drawing!!!

RESULTS: Race results will be posted on this website on the afternoon of the race. Participants must wear their bib and timing chip visibly on the front and cross the timing mat at both the start and finish lines in order to receive an official time. Runners who start in Wave-1 will be removed from the results and will not be eligible for awards if they run faster than 2 hours 15 minutes. Results will only be edited (for mispelled names, etc.) for two weeks following the event.

2015 Results & Finisher Certificates
2015 Race Photos

2014 Results & Finisher Certificates
2014 Race Photos

2013 Race Photos

2012 Race Photos

AWARDS: The top-3 male and female finishers in the half-marathon will take home cash awards in the amount of $250, $150, and $100. The top-3 male and female 5K runners will receive merchandise or gift certificate awards. In both events, the top-3 finishers in each age group will also win an award. Overall winners will be excluded from age group awards.