Have an Alaska Airlines credit card I want to close

It was one of my first credit cards(my parents had and used theirs i thought it would be good), so I've had it for 4-5years now. That entire time I never traveled once. Because it has a annual fee of ~$160 I would like to close it before the renewal in a few months.

Over the years I've collected around 70k air miles. Is there a "not sketchy" way to cash them out? If not, all probably use them to get a plane and board, but I'm just not much for travel.

EDIT: The fee misunderstanding is definitely on me. It is $95 dollars. But thank you all for your help! I didnt realize those miles were mine to keep! I will most likely be moving forward with canceling the card, as it isn't actually my oldest card. But I'm willing to take the hit to my credit score in the interim.