Infos and pic borrowed from vintage mtb workshop fb page:
Picture taken may 1984 in Durango, the King of the Mountains incorporated the Iron Horse road bike race from Durango to Silverton
Rider: Sandy Hague:
i met some nice guys from Boulder. one had a chain break on the first lap and i handed down my chain tool. hoped to pass him and retrieve it. then my Derailleur spring broke and i went Mexican Single Speed. then the chain broke and i ran in the last mile.