Korpi and Rodriguez both produced unbeatable first runs as the curtain came down on the entire snowboard season at what has been a foggy, windy and warm Spanish resort of Sierra Nevada.
Finnish snowboarder Korpi was awarded 91.00 from his first run, posting 15.50 on his second, for the win well ahead of Japanese duo Ayumu Nedefuji and Shuhei Sato in second and third.
Nedefuji posted 83.75 on his first run which allowed him to finish second while Shuhei was the most consistent with an opening effort of 82.50 and second score of 82.00 in Sierra Nevada.
That placed him third while Brit Dom Harrington claimed his best-ever World Cup finish in halfpipe, ranking 14th with 52.75 while Vancouver Olympian Ben Kilner was 20th with 43.75.
However no one could surpass the overall points total of Olympic bronze medallist Lago in Sierra Nevada despite the American not competing as he was awarded the men’s halfpipe World Cup title.
Lago had a lead of 420 points after the penultimate round in Sochi last month, with a maximum of 1000 on offer in Spain, however Yiwei Zhang couldn't do enough to overhaul him.
Sitting second overall going into the final round Zhang was the only one who came close to denying Lago but seventh after a best run of 66.75 saw him finish 60 points short.
Meanwhile Lago's American team-mate Kelly Clark already had the women's halfpipe World Cup title wrapped up and also wasn't in Sierra Nevada allowing Rodriguez to hog the limelight.
She took her first victory of the five rounds this season with a score of 82.50 from her first run with Liu Jiayu of China second with 78.00 and Switzerland's Ursina Haller third with 76.75.
Rodriguez's win was just the second of her World Cup career with her first coming over nine years ago in the Austrian resort of Kreischberg in January of 2004.