Letchworth finished their promotion and league-winning season with a near-perfect record.
The 47-20 home win over Thurrock means the Legends concluded their 22-game Regional Two Anglia campaign with 21 wins and one draw.
And they finished in style with the seven-try success giving them a total of 101 points.
The game against the Essex side almost started badly but a visiting try was ruled out in the opening stages.
Letchworth's first attack also resulted in a lost ball forward but they would get the first try of the afternoon, Rick Streets getting the score from a Luke Mongston pass.
The lead was soon doubled, Mongston again involved as he ran the ball back before getting it to Harvey Howman, via Will Titherington, for the final touch.
Josh Sharp, as he had with the first, kicked the conversion.
There would be one more try before the half-time whistle, a break by Josh Staddon starting the move that was carried deep into the Thurrock 22 by Tom Lewis.
Sharp got the score and added the conversion for a 21-0 lead.
Thurrock had gone close in the final stages of the first half and they got themselves on the scoreboard early in the second period with an unconverted try.
The home side grabbed their bonus-point next, the ever-present Oscar Robinson diving over, and they then made it five converted tries when Mongston got a deserved score.
Sonny Ma'asi got in on the act with Sharp landing a sixth conversion before Thurrock bagged three more unconverted efforts to put a bit more shine on the score from their point of view.
But the final points of the season went to Letchworth.
A line-out inside the opposition 22 led to a 5m scrum and after a penalty was awarded for a Thurrock infringement, Sharp tapped it quickly to get his second and Letchworth's seventh.
He missed the kick but not too many in the home crowd were concerned about that.
With the league season over, attention for Letchworth's men will now turn to the RFU's new community cup.
Letchworth's ladies team, the Lionesses, also played their final match of the season, going down 37-10 at Shelford.
The 10 points though were the first tries scored against the usually strong Cambridge side.
The first was ran in by Beth Sell from inside her own 22 with Lauren Brain crashing over for the second in the final play of the game.
Hitchin still have one game remaining in their Counties One Herts Middlesex season when they go to Hackney on March 25.
But they are confirmed as finishing in fifth after a 40-33 loss at the side who will end the year one place higher than them, Old Streetonians.
Stevenage Town had an away win awarded at Datchworth while the Men in Green's first team lost 38-10 at Welwyn.
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