We climbed Iroquois peak from camping out at avalance pass. The trails were somewhat icy and crampons were required getting near the summit. Full summit gear was required at the top due to harsh conditions. The path going down from Iroquois twards Mt. Marshall was very hard to stay on and very tight in areas with alot of fallen brush.
This may be new, judging from Steltech's photo: As you go over the summit of Algonquin and head down the other side toward Iroquois, the Iroquois turnoff is a right at the sign saying "Foot Path" and pointing left. The sign refers to those descending the MacIntyre's toward Lake Colden, but what you want is the shy-looking trail bearing right. About 10 yards after bearing right, you'll see a marker "Iroquois Path" and the rest of the trip is clear.