I was out of town on my anniversary/camping trip and ordered the 275 load Cs this weekend. After seeing these pictures, I'm canceling that and getting the 265 SL tires. That'll save over $300.
We just got back, we drove yet more remarkable trails on our 265 SL:
Kamikaze at 30 psi front and 36 rear (LOL, I forgot I had put 36 at home)
Bobby Hole/Devil's Lane (up and down) at 30/32 psi
Elephant Hill down and up (the backside) at 30/32 psi.
We also drove Boxcar (but down the biggest hill) and Canyonlands Overlook.
Kamikaze, Bobby's Hole, and the backside of Elephant Hill are about as hard as any climbs I plan to do. We had a tiny bit of wheelspin at the steepest spot of EH, even though it has asphalt on it, but so did a Rubicon with the front locker on and Goodyear MT-Rs. I had to revise my line at the very top of the upper section of Kamikaze and take the tallest side of the step instead of the sandy/lower side but that is a known tough spot, I was loaded, and had 36 psi in the rear.
In Utah, we have also driven Fins and Things, Tower Arch, almost all of the Maze district, and a number of other trails with no issues, all at street pressures.
The only place where I have some concerns with strength is the Sonoran desert, especially in SW Arizona. Even so, it remains by far the best choice for me: plenty of offroad but also plenty of highway.