Heading in Pinnacle Gulch on the S side of Ear Mountain between Ear Peak and East Peak, flowing SE to Crosby Creek 0.5 mi above the mouth of Step Creek, Seward Peninsula High.
Named in 1954 relative to Pinnacle Gulch.
Ear Mountain, The Ears, Ears Peak, East Peak, North Hill, West Peak,
Streams:Deer Creek, Dinsmore Creek, Eldorado Creek, Fox Creek, Hill Creek, Kreuger Creek, Maston Creek, Middle Fork Eldorado Creek, Nugget Creek, Pinnacle Creek, Saddle Creek, Short Creek, South Fork Eldorado Creek, Step Creek, Wilkins Creek, Willow Creek,
Valleys:Cabin Gully, Idaho Gulch, Pinnacle Gulch, Shaft Gully, Step Gulch,