Transandino del Sur — Bariloche to Puerto Montt via Paso Pérez Rosales and Todos los Santos Lake
Volcanoes, ferries, and two Patagonian national parks.
The crossing between Bariloche and Puerto Montt through Paso Pérez Rosales is one of the most theatrically beautiful border crossings on the continent. The route rolls west from Bariloche through Nahuel Huapi National Park on dirt and gravel roads to the Argentine border at Puerto Frías on Lago Frías, then continues via a series of ferry crossings — across Lago Frías, Lago Todos los Santos, and finally into Petrohué at the foot of the still-steaming Osorno Volcano. The driving segments involve rough lakeside tracks, soft volcanic soil, and border checkpoint waits that can stretch hours depending on the season. Osorno is an unavoidable landmark: a near-perfect snow cone that watches the whole crossing.
The ferry-assisted sections mean this isn’t a pure drive — it’s a full expedition crossing requiring advance booking through Cruce Andino (or going the all-road variant via Paso Cardenal Samoré, which is paved but less dramatic). For the drive-only variant via Samoré, any 2WD handles it in dry conditions, but the Puerto Frías approach tracks demand high-clearance 4WD. Best months are November through March — Paso Pérez Rosales can close in winter. Argentine and Chilean border formalities apply; bring vehicle documentation and allow half a day at the crossing. The reward is two national parks, four lakes, and one volcano you won’t forget.
Trail Specs
| Difficulty | Moderate |
|---|---|
| Trail Type | Overland Route, Scenic Drive |
| Surface | Dirt, Gravel, Mixed |
| Features | Camping, High Altitude, Historic, Scenic, Water Crossings |
| Length (miles) | 112 mi / 180 km |
| Duration | 2-3 days |
| Max elevation (ft) | 4265 ft |
| Best season | November-March |
| Minimum vehicle | High-clearance 4WD for Puerto Frías variant |
| Nearest town | Bariloche, Río Negro, Argentina |
| Land manager | Parque Nacional Nahuel Huapi (Argentina) / CONAF Parque Nacional Vicente Pérez Rosales (Chile) |
| Permit required | No |
| Cell service | Spotty |
| Water crossings | Yes |
| Dispersed camping | Yes |
| Official sources | Nahuel Huapi National Park CONAF Vicente Pérez Rosales |
| Start coordinates | |
| End coordinates | |
| Copy both for Google Maps directionsClick to copy the directions URL · or open it directly in a new tab | |
| Find on Google | Search on Google → |
Location
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Frequently asked questions
Do I need a lifted rig or will a stock high-clearance 4WD handle the Puerto Frías variant?
A stock high-clearance 4WD — think Tacoma, 4Runner, or Hilux — is the stated minimum for the Puerto Frías dirt variant. Low-range capability matters more than lift here; the gravel and dirt sections are rough but not technical, and the bigger variable is mud after rain.
Is this route passable in winter?
November through March is the window. Winter (June–August) brings snow at elevation and Paso Pérez Rosales can close outright; the lake ferries also run reduced or suspended schedules outside the summer season. Don't gamble on an April–October crossing without confirming both park and ferry status ahead of time.
Are there border crossing fees or park entry fees I need to budget for?
Yes — expect Argentine national park entry at Nahuel Huapi and Chilean CONAF entry at Vicente Pérez Rosales, each charged separately. The lake crossings (Lago Frías and Lago Todos los Santos) are operated by Cruce Andino and are paid ferry segments, not included in park fees; budget roughly USD $60–100 per person for the full crossing package depending on season.
What's the hardest section and what actually makes it difficult?
The gravel track between Puerto Frías and the Chilean border post at Peulla is the roughest stretch — tight, rutted in wet conditions, and runs close to water. The ferry crossings themselves aren't technically hard but impose strict schedules; miss your slot and you're stuck waiting, which can cascade into a border timing problem.
Can I drive this route end-to-end in my own vehicle, or does the ferry force me to ship the truck separately?
You cannot drive the entire route continuously — the two lake segments (Lago Frías and Lago Todos los Santos) require ferry crossings where your vehicle is transported on the boat with you. Book the Cruce Andino crossings in advance during peak season (December–February); they sell out and there's no road alternative through this section.
Trail track
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