I apologize if this is something stupid, or answered elsewhere, but is there a good way to trim Planet down to a smaller area?

I've been making some custom map stuff for mountain bike trails and I'd really like to move to self-hosted vector tiles for all layers, but too much of what I find says to start with Planet.osm when all I really need is a State (in the US) or even a few-miles-wide area.

(My goal is to basically snapshot OSM data, generate tiles, and use that until I decide to do another snapshot down the line, so the underlying data doesn't change. And limit it to a small area because that's all I need.)

Examples of maps I've done this way, and want to improve, are: https://trailmaps.app/ramba/ and https://trailmaps.app/dte/