WoW Classic dungeons by level for a first leveling run

pick up the dungeon quests before you go in. most of them sit in the zones near the entrance (deadmines ones are in westfall, wailing caverns ones around the crossroads and the oasis) and they give a big chunk of xp plus a blue reward. doing a dungeon without them wastes half the point.

Rough ranges, give or take a couple of levels: Ragefire Chasm 13-18, Wailing Caverns and Deadmines about 17-26, Shadowfang Keep 22-30, Blackfathom Deeps and the Stockade mid 20s to low 30s, Gnomeregan and Razorfen Kraul around 29-38, Scarlet Monastery wings from about 30 to 45 (graveyard, library, armory, cathedral in that order), Razorfen Downs 37-46, Uldaman 41-51, Zul'Farrak 42-54, Maraudon 46-55, Sunken Temple 50-60, then Blackrock Depths and the 60 dungeons. On a warrior, SM is the big one, you can run it for ten levels and the armory has good drops for you. Gnomeregan and Uldaman are long and confusing on a first run, fine to skip unless you need the quests. Deadmines or Wailing Caverns depending on faction.