Ski Knees Maintenance Series
Keep Your Ski Legs Strong All Winter Long!
12-Week Training Series
December 15th – March 25th
What to Expect
For 12 weeks, we’ll help you capture, preserve, and build on the progress you made during the original Ski Knees Series.
Expect ski-specific strength, stability, mobility, and power, delivered in efficient, fun, small-group sessions designed to keep you confident and injury-resilient through winter.
We’re expanding to give you more space to spread out - each class is capped at 10 people max.
*We need a minimum of 8 participants per class to run. If a cohort doesn’t fill, we’ll cancel and refund fully.
Who It’s For
Ski Knees alumni wanting to maintain the strength they built.
Skiers & riders who want to stay injury-resilient throughout the season.
Anyone who prefers structured programming over “winging it” at the gym.
People who love a motivating group setting!
Meet Your Instructor
Kelley Mast
Ski Racer
Ski Instructor
Certified Personal Trainer
Kelley is a NASM-certified personal trainer and owner of MastMountainFitness, LLC. She has been training clients and leading group fitness classes in the Snoqualmie Valley for over 12 years. In addition to personal training, Kelley is certified in spin, TRX, barre, and HIIT Chaos. Her programs focus on stabilization, balance, strength, endurance, and power to help clients feel confident, strong, and capable.
A lifelong athlete, Kelley grew up in the Colorado mountains, competed in cycling and ski racing, and more recently taught skiing at The Summit at Snoqualmie, where she earned her PSIA Level 1 certification.
Specific, targeted, dynamic training to keep you skiing from first chair to last chair — all season long.
What People Are Saying
- Scott Rinckenberger
“I haven’t gone into a season so strong and confident in years — it really is a game changer.”
- Scott Rinckenberger
“Once skis hit the slopes, we all remarked at how fresh our legs felt even on day one.”
Choose your group
Early Morning
Mondays & Wednesdays
(6:00–7:00 AM)
Start: Monday, December 15th
End: Wednesday, March 25th
Every Monday & Wednesday, 6-7 AM
24 Classes
*Skipping (Dec 22nd-Jan 2nd) & (Feb 11th, Feb, 16th)
Location: Mount Si Wellness Collective
Price: $460
Mid-Morning
Mondays
(9:30–10:30 AM)
*Note: Kelley works on the mountain on Wednesdays, so this cohort meets on Mondays only.
Start: Monday, December 15th
End: Monday, March 23rd
Every Monday 9:30-10:30 AM
12 Classes
*Skipping (Dec 22nd-Jan 2nd) & (Feb 16th)
Location: Mount Si Wellness Collective
Price: $220
Evening
Tuesdays & Thursdays
(6:00–7:00 PM)
Start: Tuesday, December 16th
End: Tuesday, March 24th
Every Tuesday & Thursday, 6-7 PM
24 Classes
*Skipping (Dec 22nd-Jan 2nd) & (Feb 12th)
Location: Mount Si Wellness Collective
Price: $460
