A guess, not an answer. You'll see what everyone else said.
Machine-generated description — written by an image model, not by a person.
A dense pack of cyclists in vintage racing gear, led by a police escort on motorcycles, races through a tree-lined road. Spectators line the sides, capturing the event. Likely a 1970s–1980s European cycling race ( ).
ClassicCycling1970sRoadRaceSpectatorSportEurope
What a machine spotted
A detector's list, not mine. It misses things and makes some up. Pick one to see where it looked.