Fishing Reports

Depends on the weather when you go. High water temps are a possibility into September, but some racecourse fish aren't minding too much as long as they're in the oxygenated riffles and rapids.  A PMD nymph seems to matter.  In the gorge at Wild Rivers, fish are mainly coming out from in front of rocks to hit swung nymphs, buggers and skated dries, especially if the water's dirty.  Not a lot of fish coming out of open water.  It's not that they're not there, though they might all be holing up under rocks, just that the murk may make your flies tough to see.  Camo buggers, red worms, golden stones, sculpins, and white flies might spark some interest.

Since many need qualification on my fishing ratings, I'm calling the Rio great because you should be fishing it.  You have this great big long river, five different species to catch, and food in many forms and plenty of hatching bugs.  Grab a six weight that can fish dries, some crossover patterns that fish for pike, carp, and smallies, bring your sunscreen and get out there and have a ball.
As for myself, I'm hoping to take an August trip into the Wild Rivers section and fish from early to late with all methods.  Midday fishing might not be too good (then again, it might), but I know they'll eat something (cranes, craws, minnows, mice, nymphs and dries) sometime.

I there's any visibility at all, I would fish the Rio from the racecourse to the state line.  I would fish stoneflies, caddis pupae, and the hatch du jour in the evening.  Down lower the water can get pretty warm, but I've had regular hookups recently in the racecourse with temps of 75 degrees. 
Remember the smallies and pike and carp if that will float your boat.  Personally, I'm psyched to get into the gorge and try to hang a big trout on a streamer.  Hopefully there won't be too much rain to mess things up, but if there's enough to put a nice stain in things, I'd say the fishing should be a bit more than insanely pleasant.

Lots of folks think the Rio is for the shoulder seasons, that the summer is just too hot or rafty.  These people need to be learned a thing or two about how much of a blast that stream can be if things are working right.  For one thing, it's close to home, and you can actually zip up there and fish an evening hatch if you want to.  For another, if the water does warm up, you can take up a 6 weight and fish opportunistically for trout, smallies, carp, or pike.  Just stroll around - these low flows make it very possible to do that - and throw buggers at the banks and see what pops up.  And there are hatches.  We've heard tell of a big mayfly making a daily appearance and quite a few caddis. 
Race course through Pilar has been fishing quite well lately on all methods.  Of course this is always subject to change if the weather's hot or the wrong cloudburst hits the wrong patch of bare dirt in the system.  Personally, I'd try the gorge as something will be happening there at some point of every day.

Good for a shot anyway; there are safer flows and clearer water.  Smallies in the park, throw big dries or streamers near the bank for some big trout, or go pike spotting.

Still a little wait until the water clears enough to fish, probably a while until it's safe too.