Dallas Seavey, born on March 4, 1987, in Fredericksburg, Virginia, is an accomplished American dog musher and sled-dog racer. Described as the “World’s Greatest Dogsledder,” He stands as one of only two mushers to secure victory in the challenging Iditarod Trail Sled Dog Race across Alaska five times, achieving this feat in 2012, 2014, 2015, 2016, and 2021. His lineage is deeply rooted in mushing, with his grandfather, Dan Seavey, participating in the inaugural Iditarod races of 1973 and 1974, as well as in 1997 and 2012. His father, Mitch Seavey, is also a seasoned Iditarod competitor, clinching victories in 2004, 2013, and 2017.

Dallas Seavey embarked on his Iditarod journey on March 5, 2005, immediately after turning 18, making him the youngest musher to compete in the race. He initially led his father's "puppy" team, a group of less-experienced dogs. By the 2009 Iditarod, he had entered the top ten, and in 2012, at the age of 25, Seavey became the youngest musher to win the Iditarod, completing the race in 9 days, 4 hours, 29 minutes, 26 seconds.

Seavey's Iditarod triumphs continued, securing his second win in 2014 with a record-breaking finish time of 8 days, 13 hours, 4 minutes, 19 seconds, narrowly defeating the second-place finisher. The following years saw him clinch victories in 2015 and 2016, with the latter setting a new record of 8 days, 11 hours, 20 minutes, and 16 seconds. In 2017, his father, Mitch Seavey, broke Dallas's record time, claiming the championship. Seavey captured his fifth championship in 2021, capturing his fifth Iditarod title in 7 days, 14 hours, 8 minutes, and 57 seconds.

Beyond the Iditarod, Seavey triumphed in the Yukon Quest sled dog race in 2011 and participated in Norway's Finnmarkslopet. 

• Dallas Seavey in Anchorage, Alaska during the ceremonial start of the 2012 Iditarod Trail Sled Dog Race (CC 2.0)
• Meet Iditarod-Winning Sled Dogs