Depends a bit on what you’re doing with them

For hard-wearing work pants, I think Duluth firehouse pants are pretty hard to beat

Dickies or Carhartt are solid, more-readily-available options

If you’re looking more for lightweight hiking pants, I used to have a pair of north face zip-off pants I really liked, but I’m not sure if they still make the same or similar model, but I’d take a look at their offerings. They were a bit pricey but not outrageous.

Barring that, a lot of my outdoors clothes tend to be Columbia.

For sort of a middle-of-the-road that can kind of fill either role, I’d probably go for BDUs. No specific brand recommendation, there’s a lot of companies making them, and while I haven’t tried them all, the ones I have have been pretty much the same. Just kind of get whatever you can get a good deal on online or whatever your local military surplus place stocks.