Looking for a new outdoorsy hobby?

I love hiking and backpacking. I have done many overnight trips ranging from 1 - 14 nights. I am not exactly bored of backpacking, but I am looking for new outdoorsy hobbies to spice up my outdoor adventures. To those of you who are experienced backpackers...How did you spice up your outdoor adventures? Have you tried climbing or mountaineering? Trail running? Kayak / Canoe / Rafting trips?

Let me know what you think is a good natural progression for someone with lots of backpacking experience, but limited climbing / water experience.