Scorers: Dumbarton - Gallagher (8), Forbes (19); Stranraer - Cameron (54)
DUMBARTON edged a close encounter at the Rock to bring Stranraer's winning run to an end.
With league positions still to play for, both sides threw caution to the wind at times in an entertaining scrap.
Stevie Farrell kept faith in the team which had tasted victory three weekends in a row, but it was Jim Duffy's men who raced into an early lead.
Sons' star man Dom Thomas supplied Stuart Carswell, whose shot broke to Calum Gallagher to rifle the opening goal in off the post.
The hosts then doubled their lead on 19 minutes, despite the best efforts of Max Currie.
The Stranraer keeper did brilliantly to turn away Ross Forbes' initial effort with a fine reflex save, but couldn't do anything about his volley as the ball came back into the box.
Blues defender Andy McDonald tested the goalkeeper with a curling free kick, but that would be the best effort the visitors could muster in the opening 45 minutes.
Just as Dumbarton bossed the first half, Stranraer were largely on top for the second.
And the Blues found a way back into the contest just nine minutes after the break.
Mark Lamont produced a sumptuous cross for Innes Cameron to power home a header at the back post, and it looked like game on.
Lamont went in search of an equaliser himself as he burst past a couple of defenders and into the box, but could only bring a save from the goalkeeper.
Grant Anderson was introduced for the closing stages, and had two chances to level the scoring.
First, he strode onto a promising through ball but was forced out wide as he raced towards goal.
Then just a few minutes later, goalscorer Cameron met Currie's kickout with a cushioned header into Anderson's path, but after letting it bounce, the ball was cleared away.
With a late leveller looking likely, Dumbarton nearly added another goal of their own to put the game to bed, but substitute Boris Melingui fluffed his lines after more good play from Thomas.
However, neither side could add to their tally.
The result means Stranraer are all but confirmed to finish exactly 8th, barring a miraculous nine-goal swing next weekend when Airdrie are the visitors to Stair Park.
Dumbarton: Adam, Ferguson, McLean, Barr, Ballantyne, Forbes, Carswell, Hutton, Barr (Melingui 81), Thomas, Gallagher (Russell 90).
Not used: Paton, Armour, van Schaik, Brennan, Thomson.
Stranraer: Currie, Hamill, McDonald, McManus, D Smith, Lamont, Turner, McCann, Victoria (Crossan 61), Cameron, Elliott (Anderson 74).
Not used: Murray, Avci, McColm, O'Keefe.
Referee: Alan Newlands