Abingdon Under 15s secured the Oxfordshire Division 2 title after winning nine of their ten matches.
They will now compete in the top division as under 16s next season.
Abingdon's only defeat came against Wallingford, but they beat Oxford, Witney, Gosford All Blacks and Bicester twice.
Head coach Pat Sweeney said: "With a squad of 26 dedicated players, we have managed to improve our performance this season, through the hard work of the team and coaches.
"Next year will be a major step up in terms of league opposition, but I remain confident that the team can continue to improve for the 2008/9 season."
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