Napa Valley Adventure Boot Camp is an outdor fitness program. Workouts are action packed, increase in intensity by…More the day, and include circuit training, interval training, calisthenics, and exercises with bodyweight, dumbbells, sandbags and kettlebells. Participants bring their own set of 5 - 8 lb. hand weights and exercise mat. Owner Jeff Larson hails from Honolulu, Hawaii, has a black belt in karate and is a N.E.S.T.A. Certified personal trainer. He has been residing in Napa since 1983.