No, it's the NW Couloir, aka NW Gully over on www.mountainproject.com
(under Alpine Rock>RMNP Rock>Longs Peak>North Face/Ridge (not the best title there); they rate it 5.3, I think, which is very generous...): http://www.mountainproject.com/v/northwest-gully/105760698
If you have access to Gillet's Rocky Mountain National Park: The Climber's Guide: High Peaks
, it's under Longs Peak West Face, p. 90/91 of my edition. FWIW, Gillet rates it 4th class. You access the route on the west
side, about halfway between the Keyhole and the Trough. As you're going along the ledges, look up to climber's left, it's that gully. Near the top is a very distinctive rock pillar that looks very much like a knight chess piece (or is it a rook...??). Anyway, very, very cool route.