Dathan James Ritzenhein (born December 30, 1982) is a retired American long-distance runner, and current head coach of the On Athletics Club (OAC). He held the American record in the 5,000 metres (12:56.27) from 2009-2010, until it was broken by Bernard Lagat. He is a three-time national cross country champion with wins at the USA Cross Country Championships in 2005, 2008 and 2010. Formerly a Nike athlete for the majority of his professional career, Dathan joined the Hansons-Brooks Distance Project team in 2017. In early May 2020, he announced his retirement from competition. He signed with the Swiss shoe brand On shortly thereafter in June 2020 and currently acts as the coach for the OAC in Boulder, Colorado.
Ritzenhein was a standout runner at Rockford High School in Michigan and the University of Colorado at Boulder. He was part of the stellar high school class of 2001 that also produced American high school and overall mile record holder Alan Webb and American half-marathon and marathon record holder Ryan Hall.
Running career
High school
Ritzenhein ("Ritz") emerged as a cult figure among high school track fans during his junior and senior years at Rockford High School, especially since he graduated from high school in the same year as Alan Webb and Ryan Hall, America's other budding distance prodigies. He set numerous state and national high school records during this time, notably in the 1600m (4:05.9) 3200m (8:41.10) and in the 5000m (13:44.70). He won back-to-back regional (Midwest) and national titles in the Foot Locker high school championship races in the fall of 1999 and 2000. There was major build-up to the 2000 championships due to the impending clash between Ritz, Webb, and Hall. Ritz scored a resounding victory over Webb and Hall in Orlando, Florida, running the 5k course in 14:35. Perhaps more impressive, the previous year he claimed an unexpected national title while setting the course record in 14:29. As a senior in high school he set the Michigan high school 5k record of 14:10 at state finals; second place was 15:05. His final cross country race in high school was at the IAAF junior world cross-country championships in Ostend Belgium where he won a bronze medal.
Collegiate
Ritzenhein began to attend the University of Colorado at Boulder in the fall of 2001 to major in history and compete intercollegiately in cross country and track. During his first cross country season he finished in fourth place at the NCAA Cross Country Championships with a time of 29:11. His finish along with the second-place finish of teammate Jorge Torres helped lead Colorado to the team title. The following spring he competed in the 5000 m race at the NCAA Track and Field Outdoor Championships, finishing again in fourth place with a 14:01.02. His 5000 personal record during that season was 13:27.77. Stress fractures caused him to decide to redshirt his sophomore year in both cross country and track. In the fall of 2003, Ritzenhein once again competed in cross country. He won the Big 12 title, and then outkicked Ryan Hall of Stanford to win the NCAA Cross Country Championships individual title. His winning time was 29:14.1. In the spring of 2004 Ritzenhein ran a 27:38.50 in his debut at 10,000 m at Stanford. The next day he won the 5000 m at the Big 12 Outdoor Conference Championships. Ritzenhein concluded his collegiate season by placing second to Robert Cheseret of Arizona in the 5000 m at the NCAA Outdoor Track and Field Championships. Ritzenhein harbored hopes of competing in the Olympic Games at the end of the summer in Athens, but shortly after the NCAA meet he developed a stress fracture in his foot. He limped through the Olympic Trials in the 10,000 m, finishing last, but was able to make the team because the two other athletes with Olympic qualifying times did not go to Athens, Bob Kennedy having dropped out of the Olympic Trials race with an Achilles tendon injury and Meb Keflezighi choosing to focus solely on the marathon. Ritzenhein ran the Olympic 10,000 m, but dropped out mid-race due to pain caused by his stress fracture. Shortly after the Olympics he decided to forgo his remaining collegiate eligibility in order to run professionally. At this time he changed coaches from Mark Wetmore to Brad Hudson.