She won the German National Mountain Bike Championships for women's cross-country in 1991 and 1993.

She won the women's cross-country German National Mountain Bike Championships in 1991 and 1993.

[3] She won the women's downhill for the German National Mountain Bike Championships in 1994, 1995, and 1998.

At the 1995 World Cup downhill at Big Bear Lake, California, Stiefl forgot to lower her saddle and started the race with it several inches higher than normal.

[4] Stiefl joined the Fiat-Rotwild racing team in 1998[5] and staged a brief comeback,[3] competing in the 1999 UCI Mountain Bike World Cup.