Series Events
Dates, Times, Directions

Points & Awards
Series Points Details

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Series Sponsors
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Welcome to the 2018 - 2019 Series!

The Racing Underground Winter Running Series brings you three amazing runs at three unique venues! The races are geared toward all ability levels, with a family-friendly atmosphere, discounted youth entries, free professional race photo downloads, and $3,400 total series prize money for the top finishers!

Participate in one event, or race all three! Discounted series entries are available for both the 5K-5K-5K series or the 5K-10K-Half Marathon series, and inexpensive youth (age 12 & under) entry fees are offered for all 5K runs!

Each race features gender specific technical running shirts (long sleeve in December and January, and a long sleeve half-zip* in February!), and youth 50/50 T's, tasty post race food, steaming hot cocoa, and Jill's famous home baked banana chocolate chip bread!!!

We hope to see you at the seventh annual Racing Underground Winter Running Series!

Darrin, Jill,and the Racing Underground Crew

Series Events

Superior Stocking Run 5k
December 16, 2018
Purple Park - Superior, CO
9:00am Start Time

Early Packet Pickup:
Runners Roost Louisville

Stuffed Goodie Stockings for all participants!
The series kicks off with the Superior Stocking Run, a festive 5K in the town of Superior on December 16th. The race is limited to 1,000 entrants, and all participants will receive a race stocking loaded with sponsor goodies. How fun is that!

Yeti Chase 5k & 10k
January 20, 2019
Bear Creek Lake Park
Lakewood, CO

10:00am Start Time

Early Packet Pickup:
Runners Roost Lakewood

Long Sleeve Tech Shirts!
Race number two is the popular Yeti Chase 5K & 10K at Bear Creek Lake Park in Lakewood on January 20th. This is the 9th year for the Yeti Chase, and it has sold out well before race day in all previous years. After chasing down the Yeti, runners wander the park's 2,500 acres, known for its diverse bird and waterfowl population as well as stunning views of the foothills.

Ralston Creek
Half Marathon & 5k

February 3, 2019
Arvada, CO
9:00am Start Time

Early Packet Pickup:
Runners Roost Lakewood

Long Sleeve Half-Zip Tech Shirt *if registered before Jan. 11!
The series finale comes at the Ralston Creek Half-Marathon & 5K in Arvada on February 3rd. The Ralston Creek Half-Marathon has sold-out in all previous years, establishing itself as Colorado's premier winter half marathon. The Ralston Creek 5K Run round's out our 5K series, with a flat and fast course! Both race courses follow a scenic mix of road and bike path through Arvada's beautiful west side.

Registration & Entry Fees

Your entry into the Racing Underground Winter Running Series includes a spot on the start line at all three races, three well marked and marshaled courses, fast and accurate chip timing with live online results, printable finisher certificates & personal finish line videos (weather permitting), a stuffed goody bag (and a stuffed stocking at the Stocking Run!), two long sleeve gender-specific tech shirts and one long sleeve HALF-ZIP tech shirt (*if registered before Jan. 11), tasty food, and lots of fun!

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To register for one or more series events separately, click the links right below the series entry fees (2 inches below this text!).

Series Entry Fees

5K-5K-5K Entire Series

  • $75 through August 27
  • $85 Aug 28 - Nov. 15
  • $90 Nov. 16 - December 3
  • &95 Dec. 4 - December 15 (noon)
  • $100 on December 16th if space available

5K-10K-Half Entire Series
  • $100 through August 27
  • $110 Aug. 28 - Nov. 15th
  • $120 Nov. 16 - Dec. 3
  • $125 Dec. 4 - Dec. 15 (noon)
  • $130 on December 16th if space available

Click links below for single event entry fees and registration:

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 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.

Point Standings & Series Awards

Series points will accumulate in overall and age-group categories.

Cash awards will be presented to the top-3 overall male and female point winners in the 5K-10K-Half Series in the amount of $250, $150, amd $100. Merchandise awards will be presented to the top-3 overall male and female point winners in the 5K-5K-5K Series.

In addition, series awards will be presented to the first place male and female point winners in each 5-year age group starting with 20-24 in both series. Youth awards for the 5K-10K-Half Series will be presented in the 19 & under category. Youth awards in the 5K-5K-5K Series will be awarded in the 12 & under division, and the 13-19 division. Overall award winners will be excluded from age group awards.

Awards at each event will be based on each runner's age on race day. Series points, however, will be based on each runner's age on December 16th (the date of the first series race) to avoid the possibility of someone changing age groups during the course of the series.

Overall points will go to the top ten male and female finishers in each race as follows: 20-16-14-12-10-9-8-7-6-5. Age group points will be earned by the top-10 male and female finishers in each age group following the same point breakdown.

Overall point winners will also earn age group points, however the final overall winners will be excluded from winning age group awards. You must earn points in at least 2 series (in the same series) events in order to be eligible for series awards. Overall series prize winners must also earn Overall Points in at least 2 events (earned with a top-10 overall finish) to be eligible for a series award.

Points are not transferable between 5K-5K-5K Series and 5K-10K-Half series, and you cannot win a series award in more than one series. Stocking Run points will count toward either series.

In the event a runner qualifies for a series award in both series, that runner will accept the award in the 5K-10K-Half Series, and will forfeit the award in the 5K-5K-5K Series. All ties will be broken by place in the Ralston Creek event. If none of the tying athletes participated at Ralston Creek, the tie will be broken by place in the Yeti Chase.

Points will be considered final at midnight on the third day after each race. If you would like to request a correction to the results or series points, the request must be made prior to this deadline.

Contact Us

Most questions are answered right here on the series website, or on the website for the specific race you are interested in. If you can't find the answer here, please feel free to email or call us!

Email: to

Phone: 303.642.7917 (this is a home phone - Call between 8am and 8pm only, please!)

Volunteering: If you would like to volunteer for a race, we would love to talk with you! Just send an email to and we'll get right back with you.

Series Results

2018-2019 Series Standings

2019 Ralston Creek Half Marathon & 5k
2019 Yeti Chase 5k & 10k
2018 Superior Stocking Run 5k

2017-2018 Series Standings

2018 Ralston Creek Half Marathon & 5k
2018 Yeti Chase 5k & 10k
2017 Superior Stocking Run 5k

2016-2017 Series Standings

2017 Ralston Creek Half Marathon & 5k
2017 Yeti Chase 5k & 10k
2016 Superior Stocking Run 5k

2015-2016 Series Standings

2016 Ralston Creek Half Marathon & 5k
2016 Yeti Chase 5k & 10k
2015 Superior Stocking Run 5k

2014-2015 Series Standings

2015 Ralston Creek Half Marathon & 5k
2015 Yeti Chase 5k & 10k
2014 Superior Stocking Run 5k

2013-2014 Series Standings

2014 Ralston Creek Half Marathon & 5k
2014 Yeti Chase 5k & 10k
2013 Superior Stocking Run 5k

2012-2013 Series Standings

2013 Ralston Creek Half Marathon & 5k
2013 Yeti Chase 5k & 10k
2012 Superior Stocking Run 5k
2012 Ralston Creek Half Marathon
2012 Yeti Chase 5k & 10k
2011 Yeti Chase 5k & 10k


Series Sponsors

Runners Roost Lakewood


Propel Zero

Boulder Running Company
Lara Bar
Rudy Project
Ultimate Direction


Road ID

El Senor Sol
XTERRA Wetsuits