There’s a lot you can do on a bike! Try mountain biking (as others suggested.) Check out the gravel scene. Hell, use some of that fitness to go on a touring or bike packing adventure.
Destination events can be a great change of focus too. This year my two main A events were Strade Bianche in Tuscany and the Rift in Iceland. Both were totally amazing, and neither really engendered any results-based stress (both have large international and I didn’t really care how I placed.) I trained for them, but didn’t stress over them, and really enjoyed the experience of both.