First, congratulations on gaining so much wealth at such a young age. I would recommend looking into turning that into a million or more before you hit 30 to insure your future is good to go (retirement age, when you cannot or just do not want to work anymore).

In terms of keeping active, I would recommend moving closer to a major metro area, this could be on the outside of the beltway so you possibly drive or take a ride in to reduce your rent/mortgage. Remember, it is hard to keep the mind busy when you live in a place with little to no activity.

Have you tried spending time working on your other hobbies, looking into things you would like get involved in (learning the ins and outs of cars, setting up a home datacenter, getting more in-depth knowledge about your favorite music genres, designing your own clothes, car mods etc.). If you do not want to move have you looked into ways to enhance your local community to bring some life into it, create jobs, get to know the locals better, conduct local hackathons, and start small conferences to get others interested into what you do, etc.?