How late into the warmer months can they survive? Is it a specific temp that kills them off?

It depends on the water body. The water bodies in North Texas in the Panhandle area that usually have cooler temperatures going into the spring, the trout usually last longer than the ones stocked in my area, Southcentral Texas. Also some stocking sites have cold water springs that feed into the water body. The only place in Texas you can catch Rainbow Trout year around is on the Guadalupe River below the Canyon Lake Trail Race down to the fourth crossing. I have friends that have caught trout in July and August fishing the Trophy Zone that is on that part of the Guadalupe River. The latest I have caught a stocked Rainbow Trout was April 24, 2020, which is still the current weight and catch & release record for South Grape Creek. That part of the creek where I caught the fish is fed by a cold water spring. It would have probably died during the late spring, early summer.


Side Note: For the most part by early April most of the trout if not caught, will die because of the water temperature. Usually the highest water temperature they can tolerate is between 65 and 70 degrees. They are a cold water species.

March Limit: Blanco River! Yellow Power Bait! Texas waters that were stocked are still holding some fish! The trout will be thinning out as the warmer weather approaches. Get em while they last!

I actually got a limit of trout fishing McKinney Falls State Park this past week. White colored sinking fly got very good results. For what I saw there are still some fish there.

So, I am taking my daughter tomorrow, below PK.
There is a riff raff downstream that should hold trout, if any are left.
What do y'all think, do we have a chance?
Or fish for something else?
We are also going to pick up rocks, so it will be fruitful no matter what.
I am fired up & so is she

I am using Power Bait & will also get worms

I usually use the Yellow or Orange Power Bait and have gotten good results all season long. I have also caught plenty of trout using worms over the years. I got a limit last month while fishing for Bluegill using worms. If there are any trout left you should catch a few using both baits. I would use the worms because just about every fish loves a worm and you have a better chance of catching a variety of different species of fish . Enjoy the time with your daughter and no matter how the trip goes, you will have some 'Life Time Memories" which are priceless.

this day was unforgettable
they opened the gates this morning & the river bottom was flooded
we fished - no luck
did some rock hounding - good luck
went to the ranch & shot 22's
really good day
we both agreed it is a memory that will last forever

"Priceless"! It just don't get any better!