Park at the large pullout on the left side of the road 1.25 miles up the canyon. This parking area is used for approaching any of the 94 routes found in The Gate Buttress area.
Hike up the trail heading west (left) from the pullout. This will take you through a shady grove with some large boulders collectively known as the Gate Boulders, which are popular for bouldering. Hike through these, and take the feint trail that heads left. At an obvious junction, go left, and then leave the trail for a more feint trail that heads up a wash (right). This soon dead-ends into some cliffs and Prune Face is on your left.
Descent: There are two ways to reach and descend from the anchors if you're not lead climbing or lowering.
The first is to climb about 50 ft left of Prune Face and scramble up a groove in some cl.3-4 slabs with exposure. Continue up the slabs until you reach a large roof. Climb under this as you are detoured to the right and into a gulley. At this point you are a little bit above the anchors. Downclimb about 50 ft on the rock on the opposite side of the gulley.
The second is to follow the trail at the base of Prune Face left until you reach a clearing. Stay on the edge of the clearing and look for a trail (may be on top of some boulders) that cuts back right and into the trees. Take this trail and cut into a clearing on the right as soon as possibe. From here, walk across an exposed but easy slab with some good foot ledges to reach the roof described in the first approach. This route is probably the safer one for downclimbing.
The climbing is very hard (much harder than similar ratings that I've climbed elsewhere in the canyon) and is continuously difficult for the entire length of the slab. There are many loose flakes (pinky-nail-size or smaller) that can tear off, and they tend to get grit on your climbing shoes, so watch out! Also, if leading, the climbing is very runout.
After climbing some of the routes, I can't reasonably agree with some of the info in Stuart & Bret Ruckman's "Rock Climbing the Wasatch Range". As such, I'm deliberately deviating from the text here by adjusting the grades (5.9+ for Straight on for You).
Above the first bolt, breath a sigh of relief as the climbing gets slgihtly easier. From this point on you're climbing on nubbins and flakes that hold by shoving the fat of your finger on them hard. They stick remarkably well to shoes, although they can break off and leave grit on the shoes as well. After the first three bolts, traverse to easier ground on the left via a series of pencil-width mantels and finish the climb in a series of flaring cracks and grooves.