Drive east of Page towards the Coal-Powered plant and follow the signs to Lower Antelope Canyon
I prefer Lower Antelope to Upper. Lower is about 1 1/2 miles(3 times as long as Upper) and you don't have to walk back through it where people tend to bump into each other. I prefer the winter season when the crowds are small and the guides are in no hurry You'll need a tripod to do longer exposures which captures the true colors
Lower Antelope Canyon produces various colors and hues during the afternoon sun.