Having never played Bangor Municipal Golf Course before, Steve DeCastro wasn’t sure what happened to his ball after he teed off on the par-3 sixth hole Friday at Bangor Municipal Golf Course.

But when a spotter gave the Falmouth resident and his group a thumbs-up signal, DeCastro knew he had the first hole-in-one of his life.

And even better, DeCastro knew he had won a new Toyota Tundra truck.

The maroon-colored 2005 pickup with a retail price of $35,067 was the prize for scoring an ace on sixth hole in the St. Joseph’s Hospital benefit tournament.

“I was just aiming for the flag. … Once [the spotter] gave me the thumbs-up, everybody went crazy,” said DeCastro, a 20-handicapper. “It was pretty incredible.”

He used a 3-iron on the 185-yard hole.

Bangor Muni pro Brian Enman said the last time something similar had happened was at least 25 years ago in the Greater Bangor Open pro-am tournament.

Tom Placella, the sales manager at Downeast Toyota of Brewer, which sponsored the truck, said the dealership has given away three or four vehicles for tournament holes-in-one in the past 12 years. Most of those have been won at Penobscot Valley Country Club in Orono, he added.

DeCastro came to Bangor for the tournament because he works in the commercial lending division of Bank of America, which does business with St. Joseph’s.

He was grouped in a scramble with Steve Harrison of Eddington, Sean Flood of Westbrook and Scott Storgaard. DeCastro teed off, aiming for the flag, but couldn’t see where his ball had gone because the cup was below his line of vision from the tee. Neither could the spotter, until she looked in the cup.

“He was pretty excited,” Enman said.

It was hard to pay attention to golf afterwards, DeCastro said, but he managed to work in a few shots in between cell phone calls to his wife and mother. The group finished at 7-under.

The hole-in-one prize couldn’t have come at a better time for DeCastro, who found out Thursday his own car will need about $1,000 in repairs.

But DeCastro won’t be able to claim his truck for another couple of weeks while the insurance company interviews DeCastro’s witnesses. Downeast Toyota holds the insurance policy on the truck.

DeCastro said he has seen offers of cars for holes-in-one at tournaments like Friday’s.

“Usually they’re pretty decent cars but this is incredible,” he said. “Leather seat, V8 [engine], all the bells and whistles.”