The High Chaparral.

The High Chaparral is an American Western-themed television series starring Leif Erickson and Cameron Mitchell which aired on NBC from 1967 to 1971. The series, made by Xanadu Productions in association with NBC Productions, was created by David Dortort, who had previously created the hit Bonanza for the network. The theme song was also written and conducted by Bonanza scorer David Rose, who also scored the two-hour pilot.