Coach Caleb Masland started a private coaching practice in 2008 and has been a full-time personal running coach since 2013, when he founded Team Wicked Bonkproof (aka TWB Running). In 2024, ZAP Endurance partnered with Coach Caleb to enhance their private coaching practice and provide an avenue for their professional athletes to get into private coaching. At the end of 2025, the TWB and ZAP Coaching practices were re-launched as Ironroot Distance.

Caleb happens to be the only member of the coaching staff who didn’t run for a collegiate program, though he did run his first marathon his senior year at Wake Forest University, somewhat on a whim to get back in shape. That race was quite a disaster after only running about 17 miles for the longest long run, and Caleb finished in over 4 hours. Over the years, that 4:06 PR was lowered to 2:28.

Caleb consistently finishes in the top tier of masters races and trains at a high level while balancing the demands of full-time work and family responsibilities.