Peru
Small well-run agency. Does extended treks, but we used them for day treks including fabulous trip to Lago Churup (4500m). Great guides, efficient, helpful, fun.
www.huascaran-peru.com
welcome@huascaran-peru.com
We found them through the hostel we were staying in, Churup Albergue
Use taxis to get you to the start of hikes. Ask the driver and get them to drop you at the top of the pass out of the valley and walk back down through the fields.
Alternatively, they'll take you up to the start of the hikes (see travel guides) and will wait for you as long as it takes until you come back down again. Take food and water, we gave our driver some too - and don't pay until you get back. All for a few dollars.
You can also catch collectivos - we did that but had to hitch back down from a one-day hike on a tour bus full of happy Peruvians who'd been on a day trip up into the lakes.
A two-week trek run out of Huaraz, taking in epically beautiful scenery: alpine valleys, glacial lakes, snow capped mountains. See where Joe Simpson "touched the void", from the comfort of a valley-floor campsite, but be prepared for long days and thin air.
Most of the local agencies along the main street running to the Plaza offer trips, as do KE Adventure Travel, Journey Latin America etc if you're time pressed and need to organise before you get there.
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