Whakaotihia te rerenga e whai ake nei: I te tīmatanga o te tekau tau 1970, i haere a Walker ki te Whare Wānanga o Oregon i reira i whakaakona ai ia e te tangata rongonui a Steve Prefontaine. Whai muri i te matenga o Prefontaine, i noho ia ki tona whare me tana hoa wahine me tana tuahine. I tohu a Walker i te United States i te 1972 International Cross Country Championships, i reira i noho ai ia i te 9 o nga wikitoria hiriwa me te kapa US, me te
1973 IAAF World Cross Country Championships, winning team bronze with an individual 30th place, and was an All-American in cross country in 1973. I wikitoria a ia i te whakataetae IAAF World Cross Country Championships, i wikitoria a ia i te whakataetae IAAF World Cross Country Championships, i wikitoria a ia i te whakataetae IAAF World Cross Country Championships, i wikitoria a ia i te whakataetae IAAF World Cross Country Championships, i wikitoria a ia i te whakataetae IAAF World Cross Country Championships, i wikitoria a ia i te whakataetae IAAF World Cross Country Championships i te tau 1973. Mai i te 1972 ki te 1978, i wikitoria ia i te Oregon Road Runners Club aquathlon wahine, he biathlon kei roto i te oma me te kaukau, e ono nga wa e whai ake nei. I te tau 1981, ka hoki a Walker ki te kaareti i te Whare Wananga o Oregon State i reira i whakangungu poto ai ia e Joe Fulton. I reira ka whakatūria e ia he rekoata kura i te 5,000 mita me te 10,000 mita. Ko Walker ano hoki te toa toa toa o Oregon i 1984, 1986, me 1987. Ko nga wharanga me te ahua o tana mahere whakangungu whakawhiti whenua i aukati i a ia ki te rere i tetahi atu marathon. Mo ana whakatutukitanga, i whakauruhia a Walker ki roto i te Portland Interscholastic League's Hall of Fame i te tau 2005.