Main Office:

High Altitude Tennis LLC

1509 York St. Suite 2L

Denver, Colorado 80206

Contact Us:

© 2009-2020 Official High Altitude Tennis Website

High Altitude Tennis

Summer Camps - After School Programs - Private Lessons

Register Now for Summer Camp 2020!

- Who is HAT? -

HAT is the highest rated junior tennis program in Colorado and we have been providing players of every age, at every level and ability, fun, positive and supportive camps, group and private lessons since 2009.

"Far surpasses anything we have encountered in a youth sports program... AN AMAZING EXPERIENCE!"

- Kelly, HAT Parent, Denver Metro


- Our Services  - 


- About Us - 

Brent Mazza

Owner/Director of Tennis


Hey! My name is Brent Mazza, and I am the Owner and Director of Tennis at HAT.  Tennis is my true passion in life. I am originally from Southern California, but I went to college in Massachusetts at Boston University...

Maryann Christensen

Executive Assistant/

After School Program Coordinator 


Hi! My name is Maryann Christensen and I’m the Executive Assistant and After School Program Coordinator at HAT. I work mostly behind-the-scenes - my many duties include scheduling the after school programs...


- Testimonials -

"The first program I am completely impressed with." - Diana Elliott
"My children are jazzed, they love it and they are inspired." - Nancy Ivankoe
"His progress is clearly visible and amazing to watch." - Donna Neale
"We cannot put into words how thankful we are." - Masood Chowdhury
5-star rating on YELP and FACEBOOK

- Results -

We share our results not to boast but to build trust. In addition to all of the fun and friendships made, we want you to know that we have a proven plan built on the principles of skill and character development. We have a track record of success for the beginner, intermediate and advanced player!
HAT students have been champions at nearly every level of competition.

Pro Tour



High School/




- Contact Us -
Tel: 650-437-9961

Main Office:

High Altitude Tennis LLC

1509 York St. Suite 2L

Denver, Colorado 80206

Summer Camp Locations throughout Denver