Hunter had perhaps the best year of her career in 1991. In April, she broke Cathy O'Brien's 10 mile World Best on the roads, with 51:41 in New York City. In June, at the European Cup in Frankfurt, she ran her lifetime best 10,000 m with 31:07.88, to finish second behind Kathrin Ullrich who ran 31:03.62. This performance moved her to fifth on the world all-time list at the time. In July she ran 48:19 for 15 km on the roads, which at the time, ranked her sixth on the world all-time list. As the world's number three (after McColgan and Ullrich) she was a serious medal contender in the 10,000 metres at the World Championships in Tokyo, however she struggled in the humid conditions and finished ninth in the final in 32:24.55