This is a very short excursion from la Paz, but it’s really a great place to see la Paz from above!
I’ve been there in April, I know now it’s July and the temperature are much higher and this would be to much for a walk during the day, I suggest you try this early in morning.
Simple walk along the “Malecon” until the “Marina” or drive to there and place the car near the petrol station. There are several ways going up, some will bring you to the cave (we have not been there), you may also walk on the road back of the hill and start from there.
We have been there as the sky was mostly cloudy and it was really amazing. Enjoy this walk and the cactus along the way!