Nathan  Kark
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Nathan Kark   T4 Endurance


Grand Rapids, MI
United States



Sport Types

Triathlon, Road Cycling, Running, Mountain Biking, Duathlon, IRONMAN, XTERRA, Swimming, Personal Training, Cross Country Skiing, High School Cross Country, Collegiate Cross Country

Preferred Athlete Levels

Beginner, Intermediate, Advanced, Professional


Coaching packages range from $60 to $325 per month. T4 Endurance also offers a la carte services such as underwater swim stroke analysis, swim lessons, and personal training.


•Remote and in-person coaching•Evaluation of past training•Training & Nutrition Plans•Group workouts•Team / group coaching rates•Seminars / workshops•Remote and in-person swim stroke analysis / bike fit / transition analysis•Multisport publication

•All distances of triathlon•Swimming•Duathlon•Cycling•Running

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Certified Personal Trainer, NCCPT; Level 1 Certified Coach, USAT

Having raced on an elite level for 15 years, T4 Endurance Head Coach, Nathan Kark is no stranger to training and all things swim, bike, and run. Within his 15 years as a multisport athlete, Nathan has conducted seminars for age group and collegiate athletes throughout the USA Triathlon (USAT) Mid-west and Mid-east regions. A recent law school graduate, Nathan has also maintained his level of fitness and competitive edge throughout the scheduling demands of law school and as a busy legal professional. He is a seasoned expert in helping each of his athletes train effectively while balancing a busy lifestyle.

T4 Endurance offers nothing but custom-tailored and innovative coaching solutions that are specially designed to meet the needs of its clients. Through his coaching plans, Nathan provides detailed guidelines, while also helping his clients understand why each workout will make personal goals attainable.


1-on-1 Coaching, Consultations, Group Coaching, Local Coaching, Remote Coaching, Strength Training, Nutrition, Mental Skills, Training Camps, Bike Fit, Run Analysis, Swim Analysis, Biochemical Analysis

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1003 Hoy St. SE
Grand Rapids, MI
United States