The final XVs match of the season at Milntown saw Langholm produce their best rugby for some time, which secured the bonus point for four tries, writes John Smith.
Not only did they show good attacking play, but they were also outstanding in defence, and kept Portobello at bay as they surged at the line for long periods.
Home skipper and centre Alasdair Cavers was playing well and contributed a brace of tries, but had to go off injured just after the interval.
Cavers put Langholm ahead after only three minutes, shrugging off defenders to go over.
Portobello had the chance of going for goal on a couple of occasions, but opted to kick for position and attacked from the line-out, but the Milntown men held out.
Cubbon made a useful break for the home side then kicked ahead and play was carried into the Porto 22.
Further pressure enabled Cavers to go over, with Cubbon converting to make it 12-0 and half- time arrived with a no further scoring.
The visitors made several forward drives at the home line after the restart, then sent the ball wide and winger Kellock raced in at the corner for an unconverted touchdown.
Cubbon kicked a penalty for Langholm and Britee Steer was on target for the visitors – and the score was 15-8 going into the last quarter.
Neat handling by the home backs brought a try for Stuart Stables and further pressure saw the forwards surge into the corner, with Steven Nicol getting the last touchdown.