Summer Splash Prairie Dog Half, 10k, & 5k

Welcome to the Summer Splash Prairie Dog Half, 10k & 5k in Castle Rock, Colorado. Part of the Prairie Dog Half race series, join us in July as we race through Castle Rock along the East Plum Creek Trail. 

For all race info, click the "race info" tap (or the links at the bottom)! 

Don't stand in line on race morning! Come say hello and pick up your packet early. And yes, you may pick up packets for your friends and family. Simply have their QR code/email with you on your phone or printed.

Date*: July 16,2026
Time: 4:00 - 7:00 pm
Location*: RNK Castle Rock
Address: 440 4th Street, Castle Rock CO 80236

These are the only dates for ADVANCED packet pick up.  You are welcome to send a friend or family member to pick up your packet for you.  If you cannot attend advanced packet pick up, you must pick up your bib and timing chip on race day morning during the allotted time. 

*Date/time and location subject to change up to a few weeks before race day! 

Head on over to Buffalo Wild Wings-8255 S Chester St Suite 200, Centennial, CO 80112- for 6 free wings with your Bib

The top three men and women of each distance (based on gun time) and top three men and women in each age group (based on chip time) receive an award!  

Must be present to claim awards/prizes. Awards will NOT be mailed.

Age groups: 
10k and Half Marathon:
19 and Under, 20-29, 30-39, 40-49, 50-59, 60-69, 70-79, 80+
5k:
0-9, 10-14, 15-19, 20-29, 30-39, 40-49, 50-59, 60-69, 70-79, 80+

Sponsor Benefits
Raise Brand Awareness
Community relations
High Visibility
Demonstration/Display opportunities
Product sampling/sale opportunities 
Partner with a charity that reflects your organization’s values
Give back to the community
Employee participation and team building

Click Here to see a 3W Races Media Kit!

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Racer Data

HISTORICALLY: Each year we've seen between 450-600 registrations.
Historically: 
7%      18 and under
16%    18-29
32%    30's
27%    40's
15%    50-64
3%      65+

36%     Male
64%     Female

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Pre-Event Contact
We would love to work with you to feature your product or business with our racers.  There are many ways to be involved and gain exposure, from hosting a packet pick up location or after-party, sponsoring a water station (at select events), adding a goody or coupon to the goody bag, providing an in-kind donation/sample for the racers on the course or at the finish line, or setting up a booth on race day at the expo. 

We can feature your business on the event webpage, racer emails or social media!  All sponsorship payments must be received before your business is included in any kind of mention or posting.

Please contact our marketing team before the race with any questions:

Marketing Contacts:
AJ Benefield 720-961-3518
Email:AJ@3wraces.com

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TENT/TABLE:  You will be given approximately 12'x12' of space.  Tents and tables are NOT included, however, some of you have already arranged for table/tent rental from 3W Races.  In that case, your tent and or table will be set for you at your designated space.

Generally, tent rental is $75 and tables are $10 each to rent for the event.  3W will bring the tent/table, set it up at your designated location and tear it down at the end of the event.  If you are interested in this arrangement, please coordinate with us at least one week in advance.

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Goody Bag Stuffers
If you have arranged to place something into the Goody Bag, please make sure your 'stuffer' reaches us by the deadline so our volunteers and staff can get it into each racer's goody bag!  Items received after the deadline will not be in the goody bag.

DEADLINE:
FRIDAY before race week. July 10, 2026 by 4:00 PM

LOCATION:
Mail to: 7960 Hollywood Street, Commerce City, CO 80022
(If you would rather drop off in person than mail/ship your items, please email us in advance to make arrangements.)

QUANTITY:
We will be packing 500 bags in 2026

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Race Day Logistics
DATE: July 18, 2026 (Saturday)
TIME: 5:00-5:30 AM Vendor Set Up, Expo opens 5:30am. Races start at 6:30AM, 10:00 is Tear Down. The finish line officially closes when the last runner crosses.  Click Here for Racer Schedule.

DROP-OFF:
You will be able to drive right up to your booth space to unload.

SURFACE:
All Sponsors will be set up in the High School Parking Lot. Please weigh down your tent appropriately if you're bringing a tent.

POWER & WIFI:
Power and WIFI are not available at this location.

EXPO & PARKING MAP -  Exact spaces are assigned on a "first-come-first-served" basis.

ADDRESS:
5254 N Meadows Dr, Castle Rock, CO 80109
Castle View HIGH School

COURSE:
Click here for the Course description.

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Race Day Contact
Please check-in at the 3W Races tent on race day regarding the specific location of your booth space!

Race Director Direct Number:
Whitney Vestal - 720-635-2665
​Whitney@3WRaces.com

SPECIAL REQUESTS

We ask that you please respect the property of our runners and kindly ask that you do NOT paper events. This includes placing advertisements on cars.

All paper advertisements need to be placed at the 3W tent and/or at your personal booth space and directly handed to runners. 

INTERACTIVE MAPS
Half
10k
5k


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START, FINISH & EXPO
5254 N Meadows Dr, Castle Rock, CO 80109
​(Castle View HIGH School)
 

PARKING 
There is plenty of parking at the High School and the next-door middle school. 

COURSE SURFACE
The course is primarily on East Plum Creek Trail and is 100% concrete.

DOGS, STROLLERS, ETC
Yes, your well-behaved, leashed dog is welcome here!  Yes, your well-behaved child in a stroller is welcome here.  Although, you may NOT ride on your stroller on the downhill portions.  It will be tempting, as those hills never disappoint those looking for a challenge. This course is suitable for all types of strollers.

SUPPORT*
5k:  There are two opportunities for water on the 5k course at miles .75 and 1.25.

10k:  The 10k will have four water stops at miles .75, 2, 4 and 5.25.

13.1:  The Half Marathon will see a water station 8 times  at approximately miles .75, 2, 4, 5.5, 6.5, 9, 11 and 12.25 with water and an electrolyte drink, at all of them. Energy gels will be at the southernmost water station at miles 5.5 and 6.5.

Port-a-Johns will be at the Expo (start/finish) and at approximately miles 5.5 and 6.4 on the half marathon course. 

CUPS - yes, there are cups at the aid stations but we are a cup-free finish line!

All distances are OUT and BACK, which means runners need to stay to the right to avoid oncoming racers.

*The 1/2 marathon course support and timing will be open for 3:30:00.  Racers must average at least 16 minutes per mile to remain on the course and receive course support.

5254 N Meadows Dr
Castle VIEW HIGH SCHOOL
Castle Rock, CO US 80109 

There is ample parking at the Castle View High School and Castle Rock Middle School.  There is NO ENTRY via Sabercat Way, but all other entrances and exits to the parking areas are open and usable.

Wanna win some cool prizes from us and our sponsors?  You'll be entered into the race day raffle when you donate 5 items to Backpack Society.  Bring your items to the donations table, and we'll place your bib number into the race-day drawing. 

Winning numbers will be posted on the information board placed next to the registration tent during the event.  When you finish, check the board for your number.  If you won, bring your ticket over to the 3W tent to claim your prize!

​Current Needs List:
 -Cereal and Granola Bars
-Peanut Butter and Jelly
-Family-Sized Box Crackers
-Canned Tuna or Chicken
-Pasta Sauce and Pasta

July 18, 2026 (SATURDAY)
5:30 - 6:30 AM Same day registration and late packet pick up
6:00 - 10:00 AM Expo Open
6:30 AM Half Marathon Start
7:00 AM 5k & 10k Start
7:45 AM 5k Awards
8:00 AM OVERALL 10k and Half Marathon Awards
8:30 AM  10k Age Group Awards
8:45 AM Half Marathon Age Group Awards
10:00 AM Finish Line Closes

We’re excited to announce that we’ve partnered with Sneakers4Good to provide you with a socially responsible way to donate your gently worn, used or new sneakers and running shoes to a good cause we support! The sneakers will help benefit Growing Home as well as give a hand up, not a handout, to micro-enterprises in 25 developing countries. The athletic shoes will be kept out of landfills where they can take decades to fully decompose. Visit Sneakers4Good to learn more!

It's super simple! All you need to do is bring your lightly worn athletic shoes and sneakers to the race (either race day or at packet pick up). We collect them and mail them and a donation is made to Growing Home! 

Please donate only gently worn, used, and new athletic shoes.  These sneakers, trainers, and other athletic shoes will be worn again by people in developing nations, so please make sure there are no holes or soles falling off and that they are in wearable condition.  Dress shoes, sandals, brown shoes, flip flops, cleats, etc. and other shoes that are NOT athletic shoes will NOT be accepted. 

Please tie your shoes together or put a rubber band around the pair! 

Each Registrant:
- Race Day Shirt 
- Finisher's Pint Glass
- Chip Time
- FREE Photo Downloads
- Free GPS Tracking for friends and family
*Those in the HALF MARATHON receive a Finisher's Medal!

A Gender-Specific Performance shirt is offered for ALL distance participants.
**Available shirt sizes are listed during registration.  In the final few days before the event, some sizes will sell out.  Not all sizes may be available for same-day registration.  Visit the 3W Races table at the Expo after 8:30 AM for shirt exchange if you are interested in trading out the size you ordered for a different size!

Backpack Society: where happy hearts and bright futures start with full bellies!

 3W Races is proud to have Backpack Society as our charity partner for this event.

Bring 5 or more items to the in-kind donation gathering on race day and you'll be entered into the race day raffle where you can win prizes!  Winners are drawn during the run and posted at the registration tent.  No need to wait around for tickets to be pulled - you'll know right away if and what you've won!! Help us feed youth in Douglas County by donating food items on race day. Preferred items are listed below:

-Cereal and Granola Bars
-Peanut Butter and Jelly
-Family-Sized Box Crackers
-Canned Tuna or Chicken

-Pasta Sauce and Pasta

Click HERE to learn a little bit more about Backpack Society

We are proud to partner with Sneakers4Good! When you donate your gently used or new athletic shoes, a donation is made to our ongoing charity partner, Growing Home!  Click here for more info!