Pedzisa mutsara unotevera: Hartmann akakurira muRockford, Michigan uye akapedza kudzidza paRockford High School muna 1999. Akaita chikwata chake chokutanga chenyika semumhanyi wechidiki pa
2000 IAAF World Cross Country Championships, kwaakapedza ari panzvimbo yechi66. Akaenderera mberi nekuwana BA mune dzidzo uye zvemagariro evanhu paYunivhesiti yeOregon uye akakwikwidza mumakwikwi akareba echikwata chemitambo cheOregon Ducks. Akawana zvikomborero zvitanhatu zveAll-America munguva yake ikoko, pamwe nekukwirira kwekuve nzvimbo yechina mumamita 10,000 paNCAA Outdoor Championships muna 2002 na2003, uye vaviri vanopedzisa mumutambo paPac-10 championships.