Riddles was born in Madison, Wisconsin to Willard and Mary Riddles, and moved to Alaska (from Minnesota; she had been living in St. Joseph while attending Apollo High School in St. Cloud) just before her 17th birthday. She saw a sprint race and fell in love with mushing. Her first race was the Clines Mini Mart Sprint race in 1978, in which she won first place. After finishing 18th and 20th in the 1980 and 1981 Iditarod races, she decided to breed her own sled dogs in order to advance. She moved to Shaktoolik, Alaska and worked as a fish seller for a short period while training her dogs, then moved to Teller, Alaska where she met Joe Garnie; they became partners and started breeding and training dogs together.
On March 20, 1985 Riddles won the Iditarod Trail Sled Dog Race, becoming the first woman to do so. She wrote three books about her adventures and also became a professional speaker. In 2007, her Iditarod Trail Race victory was inducted as a "Hall of Fame Moment" into the Alaska Sports Hall of Fame.
- Young, Ian (2002). The Iditarod: Story of the Last Great Race. contributor Timothy V. Rasinski (illustrated ed.). Red Brick Learning. p. 37. ISBN 0-7368-9523-X. Retrieved 2009-05-07.
- Riddles, Libby; Tim Jones (1988). Race across Alaska: first woman to win the Iditarod tells her story (illustrated ed.). Stackpole Books. ISBN 0-8117-2253-8. Retrieved 2009-05-07.
- Riddles, Libby; Shannon Cartwright (2002). Storm Run: The Story of the First Woman to Win the Iditarod Sled Dog Race. Illustrated by Shannon Cartwright (revised, illustrated ed.). Sasquatch Books. ISBN 1-57061-293-5. Retrieved 2009-05-07.
- Riddles, Libby; Shelley Gill; Shannon Cartwright (2002). Danger: The Dog Yard Cat. Illustrated by Shannon Cartwright (illustrated, reissue 4 ed.). Paws IV Pub. ISBN 0-934007-20-9. Retrieved 2009-05-07.
- Pardes, Joan (2000-06-29). "Entertaining the tourists". The Juneau Empire. Retrieved 2009-05-07.
- "Libby Riddles' Iditarod Victory: 2007 Induction into the Alaska Sports Hall of Fame". Conoco-Phillips Building atrium, downtown Anchorage: YouTube. Feb 3, 2009.
- Riddles, Libby (January 28, 1999). "Female Frontiers QuestChat Archive". NASA Quest > Archive. Archived from the original on June 25, 2010.
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