Might require 4x4 at some times of the year, was drivable with small SUV (Crosstrek) up to the pass TH. Beyond the Pass, the road has lots of brush from alders, to get through the last 1-2km to Jumbo Mountain a high clearance 4x4 is mandatory, there's a significant washout on the narrow road. Turning around is tight before the Jumbo mountain TH.