In the end, it came down to a left-to-right uphill 20-foot putt on the last.
He binned it.
"It feels great to have sole possession of the course record, especially round my home track," Geary said, before speculating on how low the record could go.
"Breaking 60 will take a hell of a round, but it can be done around the Mount.
"Who knows when or if it will ever happen. I had a chance a few years ago but four-putted the 17th as that was the only cored green on the course. I ended up having a 63."
The 61 represents Geary's lowest ever score to par (-11), but is also memorable for another reason.
Good friend Madden's ace on the par 3 17th was followed by a Geary laser beam that finished two foot short for an easy tap in, setting up the last for a record attempt.
"It was an awesome day for both of us ... and we won the beer too."
Geary's first event of 2015 will be the Whitford Park pro-am on January 18 before heading to the PGA Tour qualification school in China.
The next stop would then be Australasian events including the NZPGA and NZ Open.
It was a weekend of low scoring at the Mount Maunganui club, with Rodney Jackson and Colleen Noble both collecting 25 Stableford points during nine-hole Friday Twilight.
Players also went low at Sunday's Mixed Summer Cup.