Nate Siedman still remembers hitting a homerun during a baseball game on the opening day of Mesa Park in 1995, and “I will keep on remembering,” he said. Now a lawyer, a father and the coach for one of the two Little League teams in Bolinas, Mr. Siedman is watching the upcoming November election closely. 

“Without the funding from Measure F, we essentially cannot take care of our parks,” said Amber Distasi, the treasurer of…