This alternative to the Laguna de los Tres trek starts at Hostería el Pilar and heads back to El Chaltén via Río Blanco. The advantage is that it's a one-way trail (one of the only), so you are not retracing your steps. To make it to Laguna de los Tres, though, you need to get a very early start. You'll need a shuttle one-way to get to the trail head on the banks of the Río Eléctrico, at Hostería El Pilar, 17km (11 miles) from El Chaltén. Many local companies, including Mountaineering Patagonia, can help you organize this. From here it's a gradual climb to Laguna Capri before dropping back into El Chaltén.