Find Your Perfect Coach
Professional coaching for all ages and skill levels from beginners to competitive players across Treasure Valley.
All Coaches(3 found)

Calix van Lier
Tree Town Tennis
(“KAY-lix”). Born and raised near Boulder, Colorado. Played competitive tennis all over the country. Bollettieri academy? Check. Grand Junction Academy? Check. #1 singles player for DI college too. Traveling coach for a top junior player (top 2 in the country, btw). Top-level coaching experience x 20 years and counting. Yep, a legend (and a 5.0 NTRP). Oh, and RSPA professionally certified and USTA Coach. All this and brains too.
Katie van Lier
Tree Town Tennis
Born and raised in Boise. Taught all over the country (academies, high school programs, parks and recreation, and Nike tennis camps). I specialize in beginning and intermediate junior and adult players, especially the young ones (ages 5-10). I am professionally certified by the Professional Tennis Registry since 2002 with a professional certification in 10 and under juniors in 2019. USTA coach since 2025. Graduated from U of Idaho with a Recreation degree with emphasis in sports science in 2005. Executive director and cofounder of Tree Town Tennis with my husband Calix.

Trevor Jones
Gem State Tennis Academy
Trevor Jones is a dedicated tennis professional with a passion for junior development and fostering a strong tennis culture. Originally from Vancouver, WA, he grew up playing multiple sports but found his greatest interest in tennis from the age of five. After competing in junior tournaments throughout the Pacific Northwest, Trevor played collegiate tennis at Metropolitan State University of Denver before transferring to the University of Washington to pursue an architecture degree. Following graduation in 2018, Trevor transitioned into coaching, starting as the Tennis Operations Coordinator and Assistant Pro at the Seattle Tennis Club, where he coached players of all ages and levels, managed pro shop operations, and helped run events. In 2020, he was promoted to Director of Junior Tennis, where he focused on developing young players, increasing their work ethic and competitive exposure, and expanding match play opportunities in response to the challenges of COVID-19.  In late 2023, Trevor relocated to Boise, Idaho, drawn by the area's tennis potential. He quickly immersed himself in the community, coaching at Eagle Tennis Club (ETC) and assisting the Eagle High School team. Since ETC’s closure, he has joined Boise State’s junior program, working to rebuild opportunities for displaced players and striving to create a culture of discipline, passion, and high-level tennis training. Trevor strongly believes in providing players with the structure, resources, and mindset necessary for long-term development both on and off the court. Certifications: RSPA Elite Certified (pending certification this weekend) Master Racquet Technician (USRSA) Trevor is committed to expanding high-quality coaching in Boise and demonstrating the impact that a comprehensive tennis program can have on young athletes.