Any brand that uses Japanese selvage in the heavier weights lasts ages. Take a while to break in and are $$$, though.
One thing that makes them last longest is washing gently and only when necessary. Tumble dryers and fabric softeners plus dryer sheets accelerate wear drastically. I have a couple pairs from Naked and Famous that are roughly a decade old with no tears or holes.
Otherwise like mentioned here: canvas pants or the firehose material ones from Duluth last a long time too. Much easier to maintain and handle frequent washing more readily.
Interesting… didn’t know that existed. Will have to check them out. And yeah, i should have pointed out they may be too expensive to be used for harder labor, they’re just the ones i’ve owned that have held up the longest so they came to mind.