On March 10 the Sterling Chorale will set off on its annual tour, which passes through five states and follows Route 66 from Sayre, Okla., to Flagstaff, Ariz. The first stop is at the Federated Presbyterian Church in Spearville, Kan., on Wednesday, March 10. The chorale will present a total of 11 concerts on the tour, passing through Oklahoma, New Mexico, Arizona, and Colorado. Their final concert will take place in Scott City, Kan., on March 17.