You may wonder whose idea this is?!?!
La Paz is full of backpackers - young, fit, keen to tick the 'adventure' boxes and doing things on the cheap - many of whom are Israeli ( the Israeli backpacker is not always attractive in manner, as we have found before).
The standard trek is three days and they will bolt, so we've done the old-person thing of booking a private trek - just us, our guide, our cook and an extra day.
We're in training for said trek - packed the backpack with binoculars, water bottles and 2 kg Birds of Peru field guide today and trudged up and down the streets of La Paz for hours today.