 In later years, Kjellström moved to Pound Ridge, N.Y., where he helped develop trails in a county park and forest reserve called Ward Pound Ridge Reservation and to produce a detailed orienteering map of the area.He continued to be active until his death in promoting the Silva compass and the sport of orienteering, as well as conducting promotional book tours for revised versions of "Be Expert With Map and Compass".Kjellström died 26 August 1995 in a hospital in Stockholm, Sweden due to complications of Parkinson's disease.