• Distance: Approx. 13 miles (21 km)
• Duration: Eight to ten hours
• Start and end point: Valle Avilés
• Difficulty: Moderate

The trail is approximately 21 kilometres long and takes about 8-10 hours to complete, making it a challenging but achievable day hike for those with good physical fitness. If you prefer a slower pace or wish to fully enjoy the experience, you can turn it into an overnight trek as there's a designated camping area along the route.

The Lagunas Altas Loop is so named because it takes you past several high-altitude lagoons, offering beautiful views and opportunities to observe local wildlife. It's a moderate-to-difficult hike with some steep ascents and descents, but the rewards are incredible panoramic views of the park, including vistas of the Chacabuco Valley and the distant Jeinimeni and Tamango ranges.

The trail starts and ends at the park's visitor centre, and along the way, you'll traverse through lenga forests, alpine meadows, and rocky landscapes. One of the highlights is the view of the Avilés River, which carved the stunningly beautiful Avilés Valley.