The race formerly known as the "East-West" trail race, has quickly become a runner favorite among Endurance Race Series front range events. The newly designed courses stay true to form, as they will keep the Heart Rate pumping while offering some of the best views in the front range.
To help keep the essence of this race, but allow the ERS to cut back on road crossing traffic, the newly named Mountain Ridge Half Marathon and 10K will start and finish once again from Mountain Ridge Middle School, and be entirely located within the community of Highlands Ranch.
The new courses offer 100% dirt trail and single track courses , featuring manageable elevation gains.
The period for shirt purchases has now passed, if you would like to still purchase an event shirt, you may do so onsite race day.
*We have adjusted our prices, so that they do NOT include a race shirt. If you would like to take advantage of the shirt option, it is $5, and can be added in the Swag area of your registration. For those runners adding the shirt option, we ask that you register at least 10 days prior to race day, to be guaranteed of your shirt order. If you are within the 10 day window, we will ask you to pick up your shirt after the race, from the sizes available. We will do our best to accommodate all requests.
Registration fees
Prices are inclusive of mandatory charges, items, and fees
Half Marathon Closed
Online registration closed-
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$76.55Nov 1 – Mar 15
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$81.88Mar 16 – Apr 30
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$87.20May 1 – Jun 22
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10k Closed
Online registration closed-
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$44.60Nov 1 – Mar 15
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$49.93Mar 16 – Apr 30
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$55.25May 1 – Jun 22
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Site Map- Parking
10k
Half Marathon
Mtn. Ridge Finisher Medal
Event schedule
- Sat, June 23, 2018 5:30 AM - Race Day Packet Pickup/Race Day Registration
- Sat, June 23, 2018 7:30 AM - Half Marathon Start
- Sat, June 23, 2018 7:45 AM - 10K Start
Contact information
- Event contact
- Endurance Race Series
- Phone
- +1 720-835-9141
- Website
- Visit website