I'm in a relationship with a fabulous guy who grew up outdoorsy... in another country that's about as different from Alaska as you can get. (Translation: No bears or moose!) So somehow, when he came to Alaska, he never really melded back into the outdoorsy life he'd lived... until we met. Thanks to him, I've learned worlds about inviting a partner to try something new.
Anyway, it turns out the process really is that simple: Invite instead of pushing or prodding and, if your partner's open to the idea of getting outside, things will work themselves out. Who knows, you might even find yourselves celebrating Valentine's Day with a romantic hike or picnic.