Boka remained race director of the Las Vegas Marathon for 23 years until he sold the event in 2005 to Devine Racing, a Chicago-based race organization company, which was also responsible for several other races, including the Los Angeles Marathon. That year the marathon date was changed from January to December after securing Las Vegas Events endorsement along with approval of the Las Vegas Convention and Visitors Authority. Both organizations were motivated by attracting visitors during the "slower" December time period and their consent was necessary for holding any large downtown event. The course was also changed to take place partially in the city.