Ku dhammee weedhan soo socota: Hartmann wuxuu ku soo koray Rockford, Michigan wuxuuna ka qalin jabiyay Rockford High School 1999. Waxa uu markii ugu horeysay u soo galay xulka qaranka isagoo ahaa orodyahan da'yar oo ka tirsan kooxda
2000 IAAF World Cross Country Championships, halkaas oo uu ku dhammeeyay kaalinta 66aad. Wuxuu ku qaatay shahaadada BA ee waxbarashada iyo cilmiga bulshada ee Jaamacadda Oregon wuxuuna ku tartamay dhacdooyinka masaafada dheer ee kooxda ciyaaraha fudud ee Oregon Ducks. Wuxuu kasbaday lix abaalmarinood oo dhanka Mareykanka ah intii uu halkaas joogay, iyadoo ugu sarreysa ay ahayd kaalinta afaraad ee 10,000 mitir ee NCAA Outdoor Championships sannadihii 2002 iyo 2003, iyo laba kaalinta labaad ee tartanka ee horyaallada Pac-10.