John K. "Jack" Clark, 81, of Eldridge, died peacefully in the presence of family on Saturday, January 19, 2013 in Davenport. Visitation will be Wednesday, January 23, from 4 to 7 pm at The Runge Mortuary. Funeral services will be held on Thursday, January 24, 2013 at 1:00 pm at the mortuary, followed by a burial service in the National Cemetery, Rock Island, IL. Memorials may be made to a favorite charity and online condolences may be left at www.rungemortuary.com. John was born on July 27, 1931 in Davenport; the son of Earl and Esther (Trendel) Clark. After graduating from Davenport High, he proudly served his country in the U.S. Navy during the Korean Conflict. Upon his return from service, he earned a degree from Augustana College and began working as a civilian for the U.S. Department of Defense, spending most of his career at the Rock Island Arsenal. Even after retirement, John needed to be physically and mentally engaged in life, taking on a variety of jobs and volunteer work. John remained active his entire life and loved dancing, music and boating. He especially enjoyed the camaraderie and friendships he formed at Gold's Gym, where he worked out and took part in yoga, Zumba and Pilates. He was a wonderful father and grandfather, a proud uncle and loyal friend. His enthusiasm for life kept him young at heart and carried him through 81 strong years. He was preceded in death by his parents and nine brothers and sisters. Those left to lovingly remember him and celebrate his life include his sons: Jeff (Edie) Clark and Scott Clark; daughter, Sue (Roy) Yoder; granddaughter, Carley; girlfriend, Louise; best friend, Chuck Clark and numerous nieces and nephews. The family would like to extend a special thank you to the members and staff of Gold's Gym for all their support during this difficult time.