Trescothick was in imperious form against Lancashire with 111 from 79 balls
Somerset skipper Marcus Tresothick believes he has found his one-day form after a slow start to the season.
Having scored just six runs in his first three CB40 outings he has hit a 50 and a ton in his last two games.
"I had an awful start to the campaign but I've been working really hard to get that feeling back as to how to score hundreds," he told BBC Somerset.
"I did it exactly as I wanted to against Lancashire and it's nice to get that feeling and lead from the front."
Trescothick smashed Lancashire's attack for an unbeaten 111 off 79 balls, with 11 fours and three sixes, to help his side to a fifth 40-over win of the season and maintain their 100% record in the competition.
With in-form opening partner Craig Kieswetter sidelined by a calf problem, it was a timely first limited-overs century of the season for the former England opener.
Trescothick was also quick to praise the contribution of all-rounder Peter Trego, who stepped up the order and cracked 32 off just 18 deliveries to set the hosts on course to reach their target of 249 with eight overs remaining.
"He hit one of the biggest sixes I've ever seen and it's exciting. I can knock it about, take the bad ball and give the strike to Pete. It was destructive and set the innings up," said Trescothick.
We've just got to try and maintain our form - it's still only May
Somerset captain Marcus Trescothick
"It was a pretty convincing win, we were good in most areas and parts of our bowling was outstanding. At the death it was right up there as good as it could be.
"To think that we're still going five out of five even though we've rested our main bowlers at points is absolutely brilliant. It's an ideal scenario."
It was their seventh win in their last eight games in all competitions, and after a poor start in the County Championship the club is also heading in the right direction in the four-day game.
Particularly in the case of Trescothick, who failed to pass 21 in his first four innings but broke that trot with an imperious 227 against Hampshire, followed by 144 in the draw at Durham.
There will be an increased emphasis on him to maintain that form in the coming weeks against Sussex and Yorkshire, with James Hildreth on England duty with the Lions for the first of those games and Kieswetter absent.
"It will test us and we're going to have to play well and get the youngsters playing well," said Trescothick.
"But we've had a great month and it was ideal to bounce back from where we were. We were bottom of the Championship three weeks ago and could have gone top if we'd beaten Durham. And our Pro40's been pretty consistent. We've just got to try and maintain it. It's still only May."