built on
leadership
2026 YHJA Leadership
President: Allison Heidmann
Vice President: Diane Streiff, DVM (DeeDee)
Secretary: Rebecca Tolstedt
Membership/Sponsorship Chairs: Nick Ames & Holly Wiebelhaus
Awards & Sponsor Coordinator: Lane Nygren
Allison Heidmann
President
Allison is the visionary behind The Yellowstone Hunter Jumper Association, a professional jumper rider, and a proud mom of two budding equestrians. She lives in beautiful Three Forks, MT with her husband Dr. Peter Heidmann of Montana Equine.
Vice President
DeeDee is a small animal veterinarian with a passion for equestrian sports; growing up she participated in an array including 3-day Eventing, Polo, Dressage and Arabian Sport Horse. Her goal as Vice President is to provide more competition opportunities for Hunter/Jumpers and community involvement in the Big Sky area. DeeDee's horse, Grant (Gran Turismo) is an up-and-coming Hunter that she purchased as a 3yo sight unseen, from a Facebook post. Currently she is living in Helena, MT.
Diane streiff, DVM (Dee Dee)
Secretary
Rebecca lives with her husband Nick and their daughters Ellie and Madeline in Three Forks, MT. She is the owner & creative director of Wild Horse Creative, her Web & Brand Design business. When she’s not organizing YHJA activities, she loves spending time with her family and her own horse Furry.
Rebecca Tolstedt
Nick Ames
Membership/Sponsorship Chair
You know him as your favorite horse show announcer, but to the Bozeman community, Nick is so much more. Based in Bozeman with his partner, Dante, Nick balances life between the classroom and the arena, bringing energy, dedication, and heart to everything he does.
When he’s not teaching, you’ll find him at the gym or in the saddle with his heart horse, Callie. A proud and passionate member of the Hunter Jumper community for over a decade, Nick has become a familiar and trusted presence ringside.
His love for the sport has shaped his path and continues to drive his vision: creating greater access, stronger connections, and more opportunities for riders in the Bozeman equestrian community.
Membership/Sponsorship Chair
Holly is a lifelong horse professional and rider. She is a Saddle Fitter for Prestige Italia with a passion for helping riders and horses. Holly is also a Real Estate Agent in Wyoming where she lives with her husband, 2 children, horses and dogs.
Holly Wiebelhaus
Award & Sponsor Coordinator
Lane lives in Helena with her 3 horses, mini horse, dog, two kids and husband. She has over 20 years of experience in the hunter jumper community from teaching and training to volunteering and judging at local horse shows. She is also a certified acuscope therapist and holds her real estate licence in MT, WY and WI.