i'd cut the metal edge any where it is bent, as it wont bend back nicely. Then start trimming away the lose base material and core until the damage is exposed. Fill with epoxy, clamp with some vice grips, let it cure completely. Sand it down. Go ride.
Looks like the edge blew right where it seems together? I don't have experience with fixing that, but I don't see why you couldn't work your way from the good side to the bad side and slowly form it back together....
And don't use JB weld, use a waterproof epoxy when "glueing" it all back together.
I have a good feeling with some time, you can get that edge back to where it needs to be and actually fix this problem
"When I do good, I feel good; when I do bad, I feel bad. Thatís my religion." - Abraham Lincoln
You should be able to repair it so that it's serviceable. It may not look pretty.
JB Weld works pretty good actually, but in this case you may want an epoxy that is more specific for winter gear. It is going to need to be able to handle cold temps and be flexible. I'd try either the Hysol epoxy or the Urethane glue from Tognar.
This might help...Fix A Cracked And Dented Edge On Your Snowboard TransWorld Snowboarding
I would try to work that edge back in and see if it will hold together, but if it just won't conform back, you may have to sacrifice it and cut it out. As for the repair I would probably go with marine epoxy myself. The stuff I used was one hell of an adhesive! Good luck!