OverviewThis route is the back way in to the peak. It has been described as the shortest way to Thimble Peak for hikers, although the Southwest Gully route is actually shorter (if you take the Tram). The advantage to taking the Thimble Flat route is a higher elevation start, and some fantastic backcountry scenery in the Santa Catalinas. The roundtrip distance for the Thimble Flat route is about 10 miles.
Getting ThereFrom Tucson, take the Catalina Highway up into the mountains. Right around milepost 8 is the signed lefthand turn-off for the Gordon Hirabiyashi Campground. Take a left here and drive through the campsites to the end of a smooth gravel road. There is a small roundabout with multiple parking spots for dayhikers.
Route DescriptionFollow the old road heading toward Sycamore Reservoir. You will follow this road for .8 mile until you reach a saddle. At this point the road continues, but the way is barred because they are trying to re-vegetate the road. A trail parallels the road and advertises the way to Sycamore Reservoir.
There are two summits, the north and south peaks, separated by a large chimney like gulley. The north peak can be fourth-classed up a gulley with a couple hard moves for non-rock-climbers. But this peak is 10 ft lower than the other. The south peak can be climbed by scrambling to the west side and up the chimney-like gulley. Again, there are a couple of hard moves required. Once you get up as far as you can go without seriously thinking of dying, there will be a 10 foot orange slightly overhanging wall on your right with a bolt in the middle of it. To the right is an arete with a small triangular shaped ledge one can traverse to. The best option is to come with a rope and meager rack and climb straight up the orange wall. Up above there is one rappel bolt to get back down. Apparently some folks traverse to the ledge and into a deep crack and then up. This way is really exposed and I don't recommend doing it without a helmet, rope, and protection. Return the same way and enjoy your climb to Thimble Peak!
Essential GearA rope and meager rack should suffice for the south summit.
This is a desert hike / climb so bring plenty of water!