heliboarding and heliskiing
eaheliskiing is the biggest option out there because they cater to wherever you are. The company is owned and run by French guy named Lucas Chamon and he caters for beginners to pros worldwide, they have a niche in every country that heliboarding is legal. He works by refferal only but I can point you towards him if you want. He and his ex wife Isabel Davies are legends out ofthe Chamonix area. Now that heli anything is illgal in France they are based between CO and Switzerland.
This is as extreme as it gets for heliboarding if you are up for it. I boarded with them in th eCarpathians last season.