Can I wear track pants to hike in cold weather?
I mean, technically you can, that doesn't mean you should. Really it will depend on what they are made of. If they are made of polyester, then they should be reasonably good at wicking sweat off your legs and drying quickly. But the biggest concern I have with track pants, especially in cold weather is how much insulation they provide. Depending on your level of exertion (how hard you're working) they may provide too much insulation, causing you to sweat too much. Even being breathable, you don't want to hike in cold weather in something that is too heavy.
The other problem with track pants is that if you are hiking through moisture (snow, rain) then they may be too absorbent and suck up water, which will reduce the amount of insulation they provide. Another problem with hiking in something like sweats or track pants is that they aren't made to be tough.They could easily tear when snagged on a branch. You want something that is going to withstand abuse. I would hate to be hiking in cold weather and have a pant rip on me.
You may want to look at a pant that is actually built for hiking instead of a track pant. For example, the Silencr Guide Pant from KUHL is stretchy, has a water-resistant finish, is super breathable, and wicks moisture away from your legs as you hike. Besides that, the material is going to hold up if you are sliding on your butt down rocks or walking through branches that could snag or tear a hole in your pants.