Is The Everfall randomly generated? Not exactly randomly generated or endless, but the Everfall and Bitterblack Isle are both large dungeons with a lot of replay value due to randomized spawns and change in content over time. You can spend a lot of time in them and not get bored.
How often does The Everfall reset? Monsters (such as Dragons, Cockatrices, Archydras and Evil Eyes) and chests within the Everfall will re-spawn every three (in-game) days. Use the grapple button to grab onto the ledge as it approaches, preventing Fall Damage when timed correctly.
When should I go to Everfall? You get to Everfall at the right level no matter how low your level is – if you can slay the Dragon you can beat Everfall. Bitterblack is more complicated: – top equipment found there requires level ~53, so if you want to use it consider this a requirement.
How do I get The Everfall quest? This quest is obtained by talking with Barnaby inside the Pawn Guild in Gran Soren after completion of the quest A Matter of Myrmidons. Beneath the capital there is a mysterious place known as The Everfall, which supposedly hides many secrets and is considered sacred by Pawns.