The run described here begins in a beautiful section of river dubbed “Walls of the Giants” with towering rock walls above and below the put-in. Below the put-in, the river meanders through mostly Class II rapids for several miles. Before reaching the confluence with the Rio Sirupa, there are some more difficult rapids. A good reason to run this section is to access the upper Rio Aros (see description below) at one of the closest points to the take out.
| Neil Nikirk | |
| Class | III- to IV |
| Current Flow | Visual or Unknown |
| Recommended Flow |
Minimum: 500.0 Average: 1200.0 Maximum: 4000.0 |
| Typical Season |
Begins: July Ends: December |
| Recommended Use |
Kayaking: Yes Rafting: Yes Canoeing: No SUP: No Packrafting: Yes Fishing: No |
| Primary Gauge | Visual or Unknown |
| Length | 68.0 Mile(s) |
| Gradient | 30.0 FPM |
