New Castle Trails

08/06/2026

Talk trails with us at the library! Ever wondered how New Castle ended up with 45 trails and an IMBA Trail Town designation? Come find out.

Tuesday, August 11 · 5–6 PM · Garfield County Libraries — New Castle Branch, part of the New Castle Conversations series.

The story of two decades of volunteer trail building, a tour of the system from Colorow to Burning Mountain, what’s underfoot (fern fossils! a burning coal seam!), trail tips and seasonal closures — and how to get involved. Free, all ages, no bike required.

08/03/2026

That’s a wrap on the 2026 Downvalley Dirty Dozen.

Two great days at Alder Park, four races, and another fun weekend on the trails. We had 33 riders in the 20-mile, 14 in the 7-mile, 23 runners in the Trail 10K, and 5 people tough enough to take on both the 20-mile and 10K combo.

Congratulations to this year’s winners:

20 Mile: Butch Peterson & Elsa Lapeze
7 Mile: Josh Borgmann & Morgan Hill
Trail 10K: Wesley J. Toews & Kaylan Grace Riley
Combo: Ben Jackson & Elsa Lapeze

And congratulations to everyone who crossed the finish line. Full podiums are in the photos.

This event doesn’t happen without volunteers. Thank you to everyone who helped with setup, registration, timing, course marking, aid stations, cleanup, and everything in between. Thanks as well to all the kids who came out for the free Sunday races.

A big thank-you to Sunlight Mountain Resort for loaning us the big orange start arch. It made the start and finish line feel pretty special.

We’re also grateful for the businesses and organizations that support the Dirty Dozen year after year: The Neffs Co, Down Valley Brewing, Town of New Castle, Karp Neu Hanlon, Sunlight Mountain Resort, GHO, Nutrient Farm, [82], Green Cross, Defiance Cyclery, Spirits of Downtown, Bechtel & Santo, Love Your Dog, Trailhead Chiropractic, Independence Run and Hike, Medley on Main, and Troxell Law.

Full results and all 226 race photos are at newcastle-trails.org/dirty-dozen (http://newcastle-trails.org/dirty-dozen).

08/01/2026

Saturday’s Dirty Dozen mountain bike races are done. Thanks to everyone who rode, volunteered, sponsored, or came out to cheer people on. Because of you, we’re raising money to build and maintain New Castle’s trails.

Come join us at Down Valley Brewing today for awards and great music all afternoon/evening!!

There is still time to sign up for the races tomorrow!!

Trail 10K
8:00 am at Alder Park
6.2 miles of singletrack. Packet pickup and same-day registration are from 7:00–8:00 am.

Free Kids Races
Kids Run – 10:00 am
Kids MTB – 10:30 am

The kids race on a short loop at Alder Park. No entry fee, no pressure—just come out and have fun.

If you volunteered on Saturday, your Trail 10K entry is free.

Sunday, Aug. 2
Alder Park

More information and registration:
newcastle-trails.org/dirty-dozen

08/01/2026

Update all racers/spectators: parking is at Riverside Middle school/KSE tomorrow and Sunday. Follow the Alder Park path to Alder Park to the race start!

07/31/2026

Online registration closes at noon! Get er done! Thanks to the Town of New Castle Recreation for helping us out.

If you are a face to face person we will be at Downvalleybrewing from 6-8 tonight or Alder Park at 6am and can do in person registration.

Downvalley Dirty Dozen 2026 — MTB races August 1, Trail Running August 2 in New Castle, Colorado. Course maps, schedule, registration info.

07/30/2026

Another round of shout outs to our awesome sponsors for making this happen:
Green Cross Recreational Ma*****na Dispensary, Dexter Diagnostics, Spirits of Downtown New Castle, Bechtel & Santo, Love Your Dog LLC, Trailhead Chiropractic, my good friends at Troxell Law, Defiance Cyclery, and Instinct Pest Management. Thank you all so much. Registration is still open

Downvalley Dirty Dozen 2026 — MTB races August 1, Trail Running August 2 in New Castle, Colorado. Course maps, schedule, registration info.

07/30/2026

Downvalley Dirty Dozen is this weekend (Aug. 1–2) at Alder Park in New Castle.

If you’ve been thinking about racing, there’s still time to sign up.

Registration
• Online through Friday, July 31 at noon
• Friday evening at Down Valley Brewing from 6:00–8:00 p.m.
• Race morning at Alder Park during packet pickup

Saturday (Bike Races)
• Dirty Dozen MTB — 7:00 a.m. (20 miles)
• Dirty Half Dozen — 9:30 a.m. (7 miles)

Sunday (Running & Kids Races)
• Trail 10K — 8:00 a.m.
• Kids Trail Run — 10:00 a.m.
• Kids MTB Race — 10:30 a.m.

Kids races are free, and every finisher gets a prize.

Packet Pickup
Saturday: 6:00–7:00 a.m. and 8:30–9:30 a.m.
Sunday: 7:00–8:00 a.m.

After the races on Saturday, head over to Down Valley Brewing for the free post-race party on Main Street.

Awards begin at 3:00 p.m.
Still House String Band starts at 4:00 p.m.
High Country Hustle takes the stage at 6:30 p.m.

Every registration helps support trail maintenance and future trail projects here in our valley. If you can’t make the race, consider becoming an RFMBA member to support the work year-round.

Register and find all the race information at newcastle-trails.org/dirty-dozen (http://newcastle-trails.org/dirty-dozen).

07/29/2026

Check out these fresh socks we are giving away for all racers! These socks feature artwork from New Castle's own Maria Beam. Maria will be at our awards party on Saturday showing off her stuff and she's also a very generous sponsor for New Castle Trails. Check her stuff out at 82local.com

07/28/2026

Another round of shout outs to our awesome sponsors! Thank you Karp Neu Hanlon, Nutrient Farms, and Rocky Mountain EpoxyWorks for supporting our trails!

07/25/2026

Shout-out to more of our sponsors! Thank you Gearhead Outfitters, Inc. Sunlight Mountain Resort Cripple Creek Backcountry Independence Run & Hike for being presenting sponsors and helping us out with gifts for the racers next week! We got some surprises coming for top 3 finishers in each race thanks to these awesome businesses!