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Mount hood meadows does one that's decent size, some guy proposed to his girlfriend sliding across the water in a James Bond tuxedo, shot the "bad guys" that were holding his girlfriend hostage, and bam, made it all the way and proposed. So it's pretty cool hahaha, I've never done it
Mammoth has a pretty good one unfortunately they limit the amount of the people that can sign up. It's pretty long and legit though people dress up and kind of send it but at the very least its super legit