[incomplete and liable to stay that way, but I'm trying to add subpages containing detailed info, check the links]
Enchanted Rock State Park, Inks Lake State Park and the Midway Sill have their own pages.
How to get there-- Drive west on RM 1431 from Marble Falls. On the south side of the road just out of town is the local headquarters of the Cold Spring Granite Company. In the front, they have a display area where they have set up large slabs of granite from Llano and elsewhere. I don't know about access on weekends or after business hours. Bonus: At some point someone put several large blocks of sandstone layers from within the late Pennsylvanian Smithwick Fm. next to the parking area. These blocks show absolutely incredible flute casts. Alternative Granite Stop or visit the Wirtz Dam exposures. FM 2900 roadcut in Packsaddle Schist and granite.
If you only see one Paleozoic outcrop in the Llano Uplift, this should be it.
How to get there-drive north on Rte. 16, outcrop is at crest of ridge 9.0 miles (14.4Km) north of Texas 16 and 29 intersection in Llano. This is the only place were Llanite is easily accessible other than the bar at the Badu House in Llano. Be careful when parking, the topography makes this a dangerous place. If you want to make a U-turn, continue on to the picnic area a short distance further north. Roadcut in Hickory Sandstone (Cambrian Riley Fm.) on Smoothingiron Mountain.
My semi-road log for the trip to Canyon of the Eagles park and the Vanishing Texas River Cruise. Calc-silicate gneiss and typical Valley Spring gneiss at the LCRA boat ramp
How to get there-drive east on Rte. 29 (from Llano) outcrop is 0.7 miles east of FM 2241 intersection. It's a small 5 or 6 ft. high roadcut. It's small but this is the only place I've found one of the gray granites easily accessible.
The Great (or at least pretty good) Unconformity
Stuff Worth Going Out of Your Way For
Cold Spring Granite Co. Display Area (a great pseudocrop)
What to see: It's not an outcrop, but in one stop you can see a wide variety of the granites that are being quarried from the Llano Uplift plus elsewhere in the US. Great opportunity to get a feel for the subtle variations in color and mineralogy. I've got a great set of slides that I put together here. It's in close proximity to both the Marble Falls Fault outcrop and the Granite Mtn. picnic area
Granite Mountain picnic area
SOME ACCESS HAS BEEN CUT OFF
Representatives of the Cold Spring Granite Co. have stated that access to this area has been restricted due to some inappropriate behavior by local teenagers, but most likely lawyers had something to do with it.
How to get there-- Drive west on RM 1431 from Marble Falls. On the north side of the road just out of town is a small picnic area.
What to see: Even if you can't get over the fence anymore, it's still a good place to stop and look at the Granite Mountain quarry. There are some picnic tables made of polished slabs of granite from the quarry. Spot used to allow access to an exposure of the Marble Falls pluton, a very coarse-grained porphyritic granite, typical of the Town Mountain Granite suite. Pegmatites, aplites, and a difficult to find graphic granite are exposed here as well. In some places there is a very faint SE-trending alignment of elongate microcline feldspar phenocrysts.
Honey Creek roadcut on Rte. 71 (Packsaddle Schist, folded amphibolitic schist)
Hoover Point- Paleozoic roadcut, well worth a visit, combine with overlook to the west.
The Llanite Dike near Babyhead. Its a hypabyssal rhyolite porphyry containing blue quartz phenocrysts.
Stuff Worth Stopping For If You're Passing By
Buchanan Dam Visitor Center
A also a good place for a restroom stop, and a post office, because everybody loves postcards
How to get there-- On the north side of Rt. 29, just west of the bridge over the Colorado River. Watch for the sign.
Some interesting exposures of tightly folded migmatites near the waterline, see link above for picture.
How to get there-- NE end of the Buchanan dam, FM 690 north to Spur 690, watch for boat ramp signs, calc-silicates are right by the lake
What to see: Some very limited, ground-hugging, exposure of a vesuvianite-wollastonite calc-silicate similar to that seen at the infinitely better (but harder to get access to) Blount Mtn. exposures. Also there is a fair amount of exposure of some very igneous-looking Valley Spring Gneiss.
Gray granite roadcut on Rte. 29
What to see: It's a fine to medium-grained gray granite of the type that have previously been called "Sixmile" or "younger" granites. The outcrop is cut by granitic pegmatites that in places contain small, non-gem-quality, not-worth-raping-the-outcrop-to-collect, reddish garnets.
Llano River crossing in Kingsland Pluton aka "The Slab"
Town Mountain Granite exposure on FM 3404 that runs from Kingsland west to Rte. 71
The Marble Falls Fault
See fault drag, but not the actual fault in the first road cut past the trailer park going out of Marble Falls on the road to Kingsland (FM 1431). Marble Falls Limestone dips in toward the fault zone.
Sandy Creek roadcut on Rte. 71
Packsaddle Schist (a rather anemic schist in this case) exposed in the first roadcut west of the bridge over Sandy Creek. A curse on the person who snatched the beautiful radial tourmaline from the pegmatite in this road cut.
Ultramafic in roadcut near Enchanted Rock
Actually this one could get you shot at, and it's just a thin strip among the schist.
Valley Spring Augen Gneiss at Rte. 71 roadcut
First roadcut east of the big curve on the way out to Llano, pink augen gneiss, road cut is seriously chopped up fractures, maybe some faults.