As long as you're careful, I don't see any reason why not.
Oh, well, I think if you ask your doctor (which is the best thing to do), they may say this is not a wise risk to take. It's not just your ability to be safe that you have to worry about but those around you. My family went skiing when my sister was around as far along as you were. Someone ran right into her and knocked her down the mountain. She had quite a scare. it turned out alright but it could have been disastrous. I slid down the stairs when I was 17 weeks, not super hard. I got right back up. I didn't fall forward on my belly but backward on my bum. I wet on about my business. About 4 hours later, I began bleeding bright red blood. I was put on immediate full bed rest.
I just wouldn't risk it.
I would ask your dr first. It would kill you even more if you went snowboarding n somthing happened to the baby. I would b to scared to take the risk.
Even the most careful people get hurt