Approach this climb via the Phoneline Trail, which runs NNE up Sabino Canyon. The trail is fairly level and parallels the road running up the canyon. As you approach Thimble Peak a break can be seen in the wall of cliffs on the south face. This is a gully that slants all the way down to the Phoneline trail.
Leave the Phoneline Trail where the gully intersects it and head up the gully. This is mostly scrambling of the 2nd - 3rd class variety. Sometimes the easiest going is in the gully itself, and sometimes it's best to skirt the gully - do whatever works best. The gully soon leads to the upper slopes of Thimble Peak, where an easy uphill stroll leads to the summit cap itself.
The cap is actually two separate blocks. Both can be climbed, but the one to the south is higher. The easiest way to gain the true summit is to go up the slot between the two blocks. There is one 4th class move before you gain the notch between the summits. From here, you can go straight up the face to the south (a move of about 5.6 is protected by a single bolt) or traverse around to your right (west) where a low 5th-class crack slants up to the summit. A few moves should take you to the top.
It's possible to solo this peak, but a light rack and rope are helpful if you're not comfortable with the difficulty or the exposure.
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