About The Owners

Ryan Segelke was a dedicated junior player in Northern Colorado.  Driven by an extraordinary work ethic and solid determination Ryan spent 4 years on the US Pro Satellite Tour. In 2004 Ryan's focus switched from playing to teaching.  He earned a certification from the USPTA and has taken every opportunity to learn the art of coaching. 

Leslie Segelke, a former sprinter, understands sports.  As a graduate of Johnson and Wales University in Providence, RI she will share her gifts of hospitality with her love for the sport of tennis.  Leslie will serve as the manager of operations for High Altitude Tennis, LLC.

Together Ryan and leslie will lead a group of passionate and principled individuals to make a major impact on the improvement of tennis teaching.

What prompted you to start High Altitude Tennis?

For Ryan, growing up in Colorado and playing tennis, a family dream had been to start a tennis center in his hometown.  His family was not in the position to start their own program and so Ryan took his game on the road, playing professional tennis and becoming a coach, traveling and teaching.

After meeting Leslie on the courts in Boston (Ryan was Leslie’s tennis coach) and as they were deciding how they might live their life together, the couple committed to Ryan’s childhood dream of providing Colorado with top notch tennis training. 

Ryan reconnected with many of the friends he played with during his days on tour, several working as traveling coaches for ATP and WTA players while many coaching at some of the United States' most well known academies.  This provided Ryan with the opportunity to visit training programs across the country.  Along the way, he was introduced to Steve Smith.  Through the Tennissmith educational system and the coaching and development practices he observed around the world Ryan was able to format a program that he is proud to introduce to dedicated professional players, college athletes, aspiring juniors and  tennis community.


Meet Our Team
Click on images to see staff biographies
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Ryan Segelke, Owner, Head of Operations
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Leslie Segelke, Owner, Operations Manager

Michael Farrington
Head of Physical Fitness and Nutrition Specialist

Mason Mills Astley
Mental Skills Coach, Astley Performance Coaching, LLC


At High Altitude Tennis our entire performance staff is trained in the HAT Development System.  We focus on comprehensive tennis training that includes tennis specific fitness, mental skills, and sports nutrition.  At HAT we pride ourselves on our commitment to providing players with fact-based teaching and an unwavering dedication to the game of tennis and the art of coaching.

Why should I play in a High Altitude environment?

Altitude training has a profound effect on sports performance.  Training at high altitude improves oxygen delivery to the muscles.  Many athletes use the benefit of the thinner air to train harder and perform better when they return to lower altitudes.

“My motivation was higher than ever, so I started my preparation earlier than normal with high altitude training in Mexico to improve my strength and endurance.  At high altitude it was hard work, but throughout that time I knew I was improving my fitness.” - Jalena Jankovic, #1 in the world 2008 (statement made after her win in 2008)

“High altitude training in Colorado is incredible for the lungs.  Once acclimated you can run and play tennis for hours on end.  I look forward to getting out to your courts when they open this Fall.” – Michael Russell, Professional Tennis Player currently ranked #5 USA, #68 ATP (world)

“I’ve done high altitude training my entire life and whenever I go back down to sea level, I really do feel that I have an edge on everyone with my training.” – Damon Gillette, Irvine CA, Currently playing Futures and Challengers on the ATP Tour
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