A decent route following the R side of Fo.  Wander up the Mallory Cave trail past Red Devil, the Box, angle SW, and head to the third strata of Dinosaur Mt.  This lies just L of the relatively-narrow channel/groove capped with a large chockstone between Fo & Fum.  Probably not heavily traveled but worth the effort for those in search of a brief (240') flatiron explore.  Start approximately 30 feet from the R edge of Fum in a shallow, inviting, L-angling groove with good face holds.

P1.  Angle slightly L up this shallow groove.  Find a crux about 90' up as you hop up past an angled ledge.  Now head up.  Continue to a tree at 120' for a belay (optional).

P2.  Continue up to a second crux with double sidepulls and good smearing as you shuffle up.  This is somewhat reminiscent of the South Platte here.  Move slightly R and then continue to the top on easier terrain.  Hopefully you'll find a pleasant breeze at the summit.

Descend via a 50' downclimb with a few 4th or low 5th class moves to the slot between Fo & Fum (the next flatiron N).  Move N up over a boulder and head for a hole/cave to the Fum-Dum col.  Wander down a loose trail back to the base.

Binary Surd

MoFo

Quadratic Equation

This is an excellent way up a seldom travelled Flatiron. This route takes a direct line up the centre of the East face, between Quadratic Equation and Binary Surd. Begin in the centre of the east face, left of the massive chimney. Balance up the slab on positive edges using gymnastic talent and inventive gear placements. After 100 feet, it is possible to move left into the slender, right-facing dihedral for more protection if desired. Continue tiptoeing up the slab, make an exciting step across the chimney and finish up the summit block as for

Quadratic Equation

.

This climb is a well-protected, fun Flatirons climb.  Start at the left side of the east face and head straight up a left-facing dihedral that forms one side of a shallow gully.  Cross over the gully when the pro gets thin and head up the face to a belay stance about 25 feet below the south facing arete that goes to the summit.  Tackle the arete, cross a crevice, move out onto the east face and head for the summit.

Variation: from the crevice, head west and corkscrew around the summit block via some cramped moves under an overhang on the west reminiscent of

Cozyhang

on The Dome.

Descent: scramble to the northernmost point on the summit and head west to a gully that leads to top of the saddle between Fo amd Fum.  From the summit, it looks like a steep downclimb, but it's not.  Cross the gully and head up the west side of Fum and through a hole behind Fum's west face.  Hike down along the north side of Fum.  You can also descend the gully between Fo and Fum, but it supposedly requires some 5.4 downclimbing.

Description

Protection

Routes in Fo