There seem to be lots of web sites that offer to relate the history of snowboarding and most are dire. I just came across this potted history though that actually reads quite well.
I was interested that it mentions the first "National Snowsurfing Championships" held at Suicide Six in Vermont as I was there last year. Its a tiny ski hill with two small lifts in stark contrast to the mega resorts where current day comps are held which helps to give a feel for the scale of the sport in 1982.
I was also reminded of my own first cognizance of snowboarding as a teenager in 1985. It was the fabulous title sequence to A View to a Kill in which 007 is being chased on skis. After a bit of Bode Miller-esque single ski skiing he looses his final ski and picks up the front skid of a blown up snowmobile, the music changes to California Girls and he 'surfs' down the mountain into the arms of some babe in a submarine. IMDB lists one Thomas Sims as the uncredited stunt double!