© 2019 by Singletrack Trails​

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Singletrack Trails employs a dedicated team of trail builders and specialists with decades of cumulative experience as conservation corps and volunteer crew leaders. Because of their love for trails and the outdoors, Singletrack Trails staff understands how to build memorable trail experiences. As a result, our staff creates what they would want to experience themselves; a reflection of their dedication to trails and their love for the outdoors.


Greg Mazu

Chief Encouragement Officer

Singletrack Trails was Greg’s gateway to becoming a serial entrepreneur. Since 2004, Greg has significantly impacted six different ventures. Through that time, he has focused to grow Singletrack Trails’ revenues, onboard key staff members, and continue to generate a great product on the ground. Challenging the glass ceiling that the trails industry has commonly accepted, Greg finally shifted his focus with the company as an owner-operator to the Chief Encouragement Officer in 2016. Through that time, revenues have doubled, staff size has doubled, a full-time business development staff has been added, and additional revenue streams have been created. Greg has shifted Singletrack Trails from a boutique trail construction company to a multi-faceted outdoor recreation development firm.


David "Barney" Barnett

Planner & GIS Administrator

Barney has over 25 years of experience in information technology, geoscience, and geographic information science (GIS). This contributes to successful project implementation by results-driven process improvement. He uses the implementation of modern technologies, strong communication skills, professional customer support, and on-going career development.  David is a certified professional geologist, GIS professional, web map developer, and FAA licensed remote pilot.


James Flatten

Chief Project Wrangler

James Flatten joined the Singletrack Trails crew in 2007.  As the Chief Trail Supervisor, he is now responsible for ensuring that projects are completed on time and exceed expectations.  His career as a dirt shaper was packed into prominence as the Lead Course Designer and Chief Builder for the Ranchstyle Mountain Bike Festival near Grand Junction, Colorado. Knowing how to build competition courses for the 1% of mountain bikers, as well as extrapolating that knowledge to build dirt jumps, pump tracks, and rhythm trails for the 95%, is James’ specialty.  He has been adding the “free” to freeride trails since 2002. With James on the project and in charge of dirt shaping, everyone will be happy.


Aaron Cholewa

Project Wrangler

Aaron Cholewa joined the Singletrack Trails crew in 2013.  As the Site Supervisor, he is now responsible for ensuring that projects are completed on time and exceed expectations.  His career as a trail construction professional began like most as a volunteer.  Combining his recreational passion for mountain biking and his enthusiasm for advocating for the sport, Aaron began working with the Chicago Area Mountain Bikers Association. Aaron continued his passion for trail construction after moving to Fort Collins, CO to attend Colorado State University. He joined the Singletrack Trails to pursue a career in the outdoor recreation industry and has been essential in the growth and expansion of the services offered by Singletrack Trails.


Amanda Nutting

Lead Office Wrangler

Amanda Nutting joined the Singletrack Trails crew in 2017. As Lead Office Wrangler, you can find her tackling daily, behind-the-scenes office tasks and special projects. With a degree in Business Management, Amanda is in charge of building customer relationships, while supporting marketing and financial efforts. You will often see her roaming trade shows and conferences, making connections and marketing Singletrack Trails to other trail enthusiasts.

When she’s not wrangling the indoor tasks, she’s out test-riding fresh company-constructed trails and jumps that get her heart pumping.

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Shannon Harness

Company & Logistics Guru

Shannon Harness joined the Singletrack Trails crew in 2018 as a digger. With a career background in Information Technology, Telecommunications, and Outdoor Recreation Management, Shannon is now found behind the computer working on web development, logistics, and communications projects. Shannon has been a volunteer trail builder for several non-profit organizations over the past 15 years, and when he's not on his mountain bike, moto, or SUP board, he's probably working to develop new trails in his local community. 


Dan Soller

Special Projects & Marketing

Dan Soller joined the Singletrack Trails team in 2018. A Breckenridge, CO native, “The Danimal” has a background in the culinary arts, hospitality, and outdoor recreation tourism. Always seeking sweet, shreddable singletrack, Danny came to Singletrack Trails as a Digger, a Mountain Biking Guide, and Operations Guru for our sister company, Desert Rat Tours. Dan’s roles have grown into the management of Desert Rat Tours, Social Media Guru for Singletrack Trails, Desert Rat Tours, and our other sister company, Tools For Trails. He also has a hand in website management for DRT and T4T. When Dan isn’t in the office, The Danimal is out playing on his bike in the Colorado mecca of mountain biking that is Grand Junction/Fruita, playing with his dog, Zeus, or cooking up tasty fuel for his next adventure.


STI Trail Crew


The Singletrack Trails construction crew is composed of over 20 passionate trail users and dedicated mountain bikers. The crew works for Singletrack Trails to feed their addiction for providing smiles to trail users that come down the path later on. They have extensive experience as conservation corps crew leaders and as supervisors as part of Singletrack Trails. Our Trail Crew Leaders and Diggers take pride in the work they leave behind and are always striving to create the most desirable trail experience.