If you're going to switch careers (and it might not be a bad idea) why switch to something where there aren't a lot of jobs? I doubt there are a lot of outdoor recreation jobs - sure, there are going to be some, but it seems like a small niche and very geographically-specific.
If I was still in my 30s or younger I'd probably look into becoming an electrician or a plumber - the pay is good, lots of demand as older generation is retiring now, and it's going to be difficult to automate those jobs at least for the next ~20 years especially for older construction where things are often not very standard. That would get you into your late 50s at least.
The reason I didn't suggest those is because of the rapid advancements in AI and robotics, I think within about 5 years a good chunk of that could be automated or people with minimal training could use augmented reality to do it themselves. But hey, I've already taken my lumps here
I have a hard time believing that there's going to be a robot that will be able to do plumbing or electrical in an older home in the next 20 years, let alone the next 5. Will they maybe have something that helps run wire through a crawl-space? Sure, maybe. Maybe even something that could run PEX tubing under a house - maybe. But they're going to get into situations where they get hung up, stuck, etc. and require a lot of skilled help. They could be a labor saving device, but they're not going to completely replace the plumber/electrician for a long time (on existing construction - it's an easier problem with new construction because it can be designed in such a way as to accommodate robots. Still, there's a lot of existing construction and a shortage of both plumbers and electricians).
If I was still in my 30s or younger I'd probably look into becoming an electrician or a plumber - the pay is good, lots of demand as older generation is retiring now, and it's going to be difficult to automate those jobs at least for the next ~20 years especially for older construction where things are often not very standard. That would get you into your late 50s at least.