Deibold, who placed 10th, has satisfied the objective criteria for Olympic team qualification along with teammates Trevor Jacob (Golden City, Calif.) - who took his first career snowboardcross victory on Saturday - and Nate Holland (Squaw Valley, Calif.). Holland took fourth place at Saturday's World Cup event and Nick Baumgartner (Iron River, Mich.) took sixth.
The Olympic team will be named later this month.
Olympic medalist Lindsey Jacobellis (Stratton Mountain, VT) took third in the women's race - her 38th career podium - with Canadian rider Dominique Maltais sealing the victory.
Jackie Hernandez (Londonderry, VT) finished ninth.
"Today was awesome. It's amazing to see these guys stepping up and getting faster and faster at each race and to have that many of our riders in the big final and Alex Deibold in the small final. It's just so hard to accomplish that and was really amazing to see," said snowboardcross head coach Peter Foley. "From the very first time we brought him to camp, I thought Trevor was super talented and cool and to be able to watch the progression from that to this, his first world cup win, has been amazing to see. Lindsey rode great in all the heats making solid passes and good racing. She had a small bobble in the start of the final heat, and the way this course was racing, if you had a mistake in the top section, it was really hard to make up.