Wimborne, 19, of Team on-Form, demonstrated his considerable abilities to break away from a rival on the final lap.
With lots of movement early on in the race, it was unclear the entire field had come to race hard. When the elastic finally snapped it was Wimborne and Vitus Pro Cycling’s Tim Torrie who moved away from the pack.
The two worked well together until the last lap, when Wimborne made his final move to storm to victory.
Omer Shapira of the Canyon/SRAM pro team was impressive in the three-stage Amgen Tour of California, placing eighth overall.