Welcome to POTN
Since you're also new to photography, I suggest you check out some of the excellent stickies on composition, exposure, and all the fun stuff that will help you learn and improve - although critique is a great way to start.
#1. I agree with djphatjive - not really an interesting shot, although a crop in closer to the rock would help. It is overexposed, and probably a bit too contrasty as well (highlights have no details, shadows blocked up a bit. I think you might want to check the white balance on this shot too because the snow is a little blue. Good catch on the lighting - that warm light makes for great photographs.
#2. The best image in the set - compositionally, it leads the eye through the image with the lines and the nice splash of color. It's also a little overexposed and contrasty - cut back a little on that and your colors will still pop, but you'll have more details. Because the sky in both corners is a bit distracting, a slight crop in to cut those out will make the composition stronger.
#3. Nice job on the focus - all those cattail feathers are sharp and in detail. Also overexposed - you should be able to see details in those highlights - you're almost there, but just a little hot. Because of the subject matter, this shot would probably work better in a vertical composition. The mountain lines behind the cattail subjects don't really add to the image, so a horizontal shot leaves a lot of empty space.
Given that all three images were overexposed, I suggest you check your moniter and see if it needs calibration. Keep shooting, and good luck!