Summerhays delighted friends and fans in his home state. He lives about 20 miles from the Park Meadows course in Heber City.
'I would rather win this one than ... well, I don't know about the Senior Open,' Summerhays said. 'Those two are right there together. This one, because of the way people have treated me. I grew up in this area.'
Summerhays was at 12-under for the tournament, followed by first-round leader Mike Smith at 11-under and John Jacobs at minus-9.
After an opening-round 67, Summerhays had eight birdies and a bogey in the second round, giving his gallery of about 30 relatives and dozens of friends plenty to cheer about.
The Summerhays name is well known in Utah. Carrie Summerhays, Bruce's daughter, plays at BYU. Danny Summerhays, Bruce's 17-year-old nephew, won the state amateur last month.
His son, William, is carrying his clubs this week. Another son, Joseph, plays the mini-tours in Florida.
Jacobs made his way to 11-under with a birdie at No. 9, but had back-to-back bogeys on the next two holes.
On the par-5 15th, Jacobs took off his shoes and socks to stand knee-deep in the pond below the green, swatting at his steep lie just above the waterline. The ball couldn't clear the lip and rolled back down.
He double-bogeyed that hole but came back with two consecutive birdies.