Leaders of the National Championship Air Races held in Reno since 1964 plan visits later this year to six Western cities that have submitted bids to host the annual competition beginning in 2025. They are in Utah, New Mexico, Colorado, Wyoming, California and Arizona. Event organizers announced early this year that the races last month would be the last in Reno because of a variety of factors, including rising insurance costs and encroachment of housing around Reno-Stead Airport where the races have been held for more than a half-century.