Coach Steve Ojomoh hailed the victory for his Trowbridge side as they lifted the RFU Intermediate Cup at Twickenham at the weekend.
Trowbridge rose to the occasion at the home of English rugby to beat Leek 22-19, with tries from Karl Parry, Jackson Szabo and Sean Jones. Lloyd Davis kicked a penalty and two conversions.
Former Bath and England international Ojomoh said: "I'm pleased for the town, the club and all of the players and the supporters.
"We got to the club at half-past-nine on the morning and there were hundreds of well-wishers there – we just had to do it for them.
"We deserved it. We've worked hard all season and after losing two games in the first month, we've always been playing catch-up.
"We've been on the road in cup final after cup final but we wanted the big prize, and we've done it."
Trowbridge captain Matt Howard said: "Leek had the opportunity to kick for the three points to take it to extra-time but I think they thought momentum was on their side.
"But we managed to hold them off for a few phases and got that crucial turnover.
"To get here is one thing but to get here and win; words can't describe it."