
Photos: Pablo Nazareno Alvar… (CC BY 3.0) — via Wikimedia Commons
A large reservoir in southern Mendoza, on the Atuel River, surrounded by bluffs and famous for its good-sized pejerrey (silverside). Wide waters and wind, at the gateway to the Atuel Canyon.
The pejerrey is the main species, fished drifting from a boat with multi-hook leaders and from shore; in the colder, deeper water the rainbow trout appears. The cool season (autumn-winter-spring) is the most productive for pejerrey. El Nihuil has clubs, boat ramps and services, and is a base for touring the canyon.
Base data: OpenStreetMap (ODbL)
At El Nihuil Reservoir (Mendoza) you can catch Argentinian silverside (pejerrey), Brown trout, Rainbow trout. Allowed styles: Boat, Shore, Trolling, Reservoir.
Access via Route 144 from San Rafael. Inns and boat ramps.
Mendoza provincial permit.
| Season | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC | IDX | NOW |
|---|
| Argentinian silverside (pejerrey). PEAK JUN–AUG | 70 | Excellent | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rainbow trout. PEAK MAR–APR | 45 | Good | ||||||||||||
| Brown trout. PEAK MAR–APR | 15 | Off |
The number (0 to 100) sums up how likely the species is to be active here this month: it weighs the season, recent catch reports and, where there is a river gauge, the water level.
The pejerrey is a medium-sized fish with a delicate mouth, so the tackle leans to the fine and sensitive side. A recommended setup:
The philosophy of the tackle is simple: the finer and more sensitive it is, the more bites you will detect and the more you will enjoy the fight of this silver fish.
Gear is chosen according to the environment and the expected size. A versatile, concrete setup:
Spinning (general use, rivers and lakes):
Fly fishing:
Recommended accessories: rubber net (less harm to the fish for release), forceps for removing hooks, barbless hooks, and waders for safe wading in cold water.
The gear is matched to the setting and the size of trout you are after, but these setups cover most situations in Argentina:
Spinning (general use, trout of 1 to 3 kg):
Fly:
For trophy specimens (5-10+ kg at the Strobel): step up the power—medium/medium-heavy spinning with 15-20 lb braid and a robust fluoro leader, or a 7/8 fly outfit—because these are fish with strength and runs far superior to the average trout.
In every case: a well-adjusted drag, sharp hooks (barbless if you are going to release), and a rubber net to handle the fish with the least possible harm.
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