Check out the Henry Diltz photograph of Micky Dolenz in a helmet at a San Diego amusement park in February 1970. Photos from that particular session were later used on the back cover of The Monkees' final original album, Changes, in 1970.
Micky, Davy, and Michael were filming a commercial for Kool-Aid at the amusement park as the company sponsored The Monkees television series when it began reruns in 1969:
Recap: Monkees Farewell Tour
Dolenz sings Nesmith