Train Smarter

with the Science of Results

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Goal Oriented

with Clear Communication

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Data Driven

Individualized Training

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Coaching & Nutrition Services

Source Endurance strives to help each client enjoy the success that comes with performing an exceptional ride on days that matter to them.  This success helps the athletes live their best lives through positive and successful experiences.

Our coaches are true athletic performance advisors and have extensive experience in road cycling, mountain biking, cyclocross, gravel, time trials, track, multisport, XC ski, Zwift (virtual racing), and more. In addition, our in-house RDN expands our professional services and enhances the wealth of knowledge we leverage to maximize your coaching relationship and provide you with the tools to reach your goals.



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Camps & Clinics

Being at a Source Endurance cycling camp is like being a professional, but without all the pressure or hype. Enjoy learning from professional coaches and athletes in a comfortable, adventurous setting. We offer gravel, road, cyclocross and criterium camps.

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From The Coaching Chronicles


Annual Performance Evaluation in Cycling

By Adam Mills | September 22, 2023

The Annual Performance Evaluation in cycling, when paired with an athlete’s self-evaluation is a crucial tool for identifying areas of needed improvement, tracking progress, improving performance durability, advancing results, and achieving personal milestones.

Dr Echo

Dr. Echo Dahl Rowe’s Leadville Trail 100 PR, 8 Years Later

By Adam Mills | September 14, 2023

Of all the athletes I’ve ever worked with, Echo’s drive to succeed in whatever she chooses is among the very best. This need to succeed is directly reflected in her work ethic and can be seen in everything she does.

sdbc team

San Diego Bicycle Club: Summer 2023 Recap

By Adam Mills | September 8, 2023

With the road season stretching from mid-January to early August, it can be a difficult balancing act to stay consistent and perform from start to finish. SDBC did an excellent job of representing the club during the late Spring and Summer months, racking up several wins and many podium finishes across multiple fields.

"My work/life balance has not always allowed me to train/race or even ride as much as I would like. I appreciate my coach for his willingness to adapt to my challenging schedule so that I am able to enjoy my limited time on the bike without feeling guilty or frustrated for having a lack of fitness. Adam and Source Endurance have been a great partner for the past 10 years both on and off the bike!" 

- Patrick Robinson

“My season goal was to finish DK200.  Goal crushed.  I can’t say enough how well the plan leading up to Dirty Kanza worked out.  Perfect on so many levels, I was beyond ready mentally and physically, evidence by beating my DK goal by almost 2hrs.  BWR challenged me technically, but the rest was a piece of cake in terms of my readiness for the duration and heat.”

– Sonja Johnson

“I’ve loved working with Grant and Source Endurance so far, really happy wtih the results I’ve been seeing this cross season!”

– Alex Edwards

“Just wanted to say the year is turning out okay despite rocky winter. Steady build has me seeing power numbers as high as I’ve seen in a decade. Now onward to DK 200. Thanks for the guidance!”

-Trey Harrison

“Basically just writing to say a big thank you.  I truly don’t think my performance would be where I’m at without the training regimen you provided. During those primes and sprints I felt unstoppable.  I was calculated, composed and even more importantly, coached, on exactly what I needed to do.”

-Chris Lowry- La Crosse, Wisconsin

Thank you so much for your help. With your help I had exactly what I needed to stay healthy and fueled so I could keep my mind on racing. Minimal cramps with your electrolyte prep three days prior and all the calories I needed to finish up in the 10% of the Unbound Gravel 2023! Thanks again for taking all the guesswork out of my nutrition plan and helping me in the top 10%!
- Sebastian Alvarez