The start of the Open Womens 8k race at the USATF Cross Country National Championships held Feb 7, 2015 at the Flatirons Golf Course in Boulder, CO.

The start of the Open Womens 8k race at the USATF Cross Country National Championships held Feb 7, 2015 at the Flatirons Golf Course in Boulder, CO. The top 6 women vying for a spot on Team USA for the IAAF World Cross Country Championships in Guiyang, China. Photo: Todd Straka

Sarah Hall takes the outside line half while Laura Thweatt and Brianne Nelson take the inside, on the backside of the course mid-race.

Sarah Hall takes the outside line half while Laura Thweatt and Brianne Nelson take the inside, on the backside of the course mid-race. Photo: Todd Straka

Boulder Track Clubs Laura Thweatt starts to push the pace with Sarah Hall pulling behind.

Boulder Track Club’s Laura Thweatt starts to push the pace with Sarah Hall pulling behind. Photo: Peter Jones

Thweatt-ditch

Laura Thweatt surged after 6k delivering a final blow, finishing with a 29 second lead over 2nd place Mattie Suver. Photo: Todd Straka

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Colorado Springs’ Mattie Suver finished with a strong 2nd place in the USATF Cross Country Championships Women’s Open race in Boulder, CO Feb 7, 2015. Photo: Todd Straka

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Sarah Hall fights to the finish. she was caught in the last 400 meters by Jen Rhines (right) who finished 3rd overall while Hall finished  in the USATF Cross Country Championships Women’s Open race in Boulder, CO Feb 7, 2015. Photo: Todd Straka

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The Men’s Open Race gets ready to start as only the top 6 runners will be selected to compete at the Worlds Championships in Guiyang, China. Photo: Peter Jones

Boulder’s Andy Wacker led out through the first 2k loop before getting swallowed up by the pack shortly after. Photo: Todd Straka

The pack starts to string out halfway through the race with Dathan Ritzenhein and Ben True still in the hunt. Shortly after Chris Derrick will put in a huge surge to separate himself from the challengers. Photo: Todd Straka

Chris Derrick completely dominated the field taking his 3rd straight win and securing his spot on his way to Worlds in China.

Chris Derrick completely dominated the field taking his 3rd straight win and securing his spot on his way to Worlds in China. Photo: Todd Straka

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Dathan Ritzenhein pushes hard through the last lap. Photo: Todd Straka

Chris Derrick signals his 3 peat while crossing the finish line at the USATF National Cross Country Championships.

Chris Derrick signals his three-peat while crossing the finish line at the USATF National Cross Country Championships. Photo: Peter Jones

Boulder's Sage Canaday congratulates Curtis Begley on his finish at the end of the Open Men's 12k Race. Photo: Peter Jones

Boulder’s Sage Canaday congratulates Boulder Track Club’s Curtis Begley Jr. on his finish at the end of the Open Men’s 12k Race. Photo: Peter Jones

Boulder Running Company/adidas topped the podium in the Masters 40+ Bowerman Track Club was second and Santa Barbara Running and Racing rounded the podium with third.
Photo: Todd Straka

On the Masters 50+ podium, Athletics Boulder took 2nd place to the Genesee Valley Harriers while Cal Coast Track Club took 3rd. The Boulder Road Runners took the top 2 spots in the 60+ age groups. Photo: Todd Straka

Masters Women Podium

Colorado teams swept all of the masters womens podiums that day. Boulder Mountain Warriors, Colorado Racing Club and Runners Roost take top honors in the 40+ division. Colleen De Reuck won the Women’s Masters race, Melody Fairchild finished in a close second, Maureen Wrenn finished a strong 3rd. Photo: Jay Survil

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Junior Men’s Winner, Conner Mantz. Photo: Peter Jones

“This year was really tough for me with being injured during cross country season,” Mantz said. “I missed six weeks of training and didn’t perform well at states or Foot Locker Nationals. The thing that kept me going and gave me hope was that I could redeem myself (in Boulder). I can’t wait to wear USA across my chest.” – USATF

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Runners leave it on the course at the Junior Men’s Race. Photo: Peter Jones

CUs Kaitlyn Benner (504) and Valerie Constien (509)ran alongside much of the 6 km race until Benner kicked in the home straight to seal the victory and punch her ticket for Guiyang. “I was really hoping Val or I would win today,” Benner said. “It means so much to make Team USA here in Boulder, where we train and compete. It’s so exciting to share this with her and I can’t wait for the experience in China.” Photo: Peter Jones

Full results from the USATF USA Cross Country Championships held in Boulder, CO on Feb 7, 2015 races can be found on the USATF site.

More photos from BoulderRunner can be found here on Flickr.