I do a lot of hiking for lines in ski boots. The key is to PACE yourself. If someone is behind you and on your tail, let them by, don't kill yourself trying to go faster or you'll be twice as tired when you get to the top. It's not uncommon for me to get passed up early in a hike and then pass those people back later on because they over-exerted themselves while I just maintained a steady pace.
(all of this applies equally to the skin track in the backcountry)