All Road Conditions

Road Conditions: San Martín de los Andes

Explore the breathtaking landscapes around San Martín de los Andes with confidence. This guide provides essential information for navigating Patagonia's diverse roads, from the iconic Seven Lakes Route to rugged backroads, ensuring a safe and memorable driving adventure.

Overall Driving Difficulty: moderate5 main roads

San Martín de los Andes, nestled in the Patagonian Andes of Argentina, is a gateway to stunning national parks, pristine lakes, and challenging mountain passes. Driving here offers unparalleled scenic beauty but requires preparation and awareness of varied road conditions. Expect a mix of well-maintained paved roads and unpaved 'ripio' (gravel) sections, especially on more remote routes and passes. Seasonal changes drastically affect driving conditions, with winter demanding particular caution. This guide aims to equip you with all the practical details for a smooth journey.

Main Roads

RoadFromToDistanceSurfaceConditionHazardsSeasonal Notes
Ruta Nacional 40 (RN40) - Seven Lakes RouteSan Martín de los AndesVilla La Angostura (towards Bariloche)110 kmpavedexcellentwinding roads, animal crossings (deer, sheep), dense traffic in peak seasonGenerally excellent year-round. Increased tourist traffic in summer. Can experience ice or snow in winter, especially on higher sections. Fog can occur during autumn and spring.
Ruta Nacional 40 (RN40) - North SectionSan Martín de los AndesJunín de los Andes40 kmpavedgoodanimal crossings (cattle, sheep), occasional potholes on older sectionsGenerally good. Minimal issues year-round. Watch for strong winds, especially in spring and summer.
Ruta Provincial 19 (RP19)San Martín de los AndesChapelco Ski Resort20 kmpavedgoodsteep inclines/declines, sharp curves, heavy traffic during ski season, ice/snow in winterWell-maintained for ski access. Chains may be mandatory in winter, especially during heavy snowfall. Check resort updates before heading up.
Ruta Provincial 62 (RP62) - Hua Hum Pass (to Chile)San Martín de los AndesHua Hum International Pass47 kmmixedvariableloose gravel (ripio), dust (summer), potholes, wildlife (deer), narrow sectionsThe first section is paved, then transitions to gravel. Pass is usually open year-round, but gravel sections can become very rough after heavy rains or snow. Check border status and road conditions before attempting in winter.
Ruta Provincial 48 (RP48) - Lake Lolog/YucoSan Martín de los AndesLake Lolog / Yuco Beach12-25 kmgravelfairloose gravel, washboarding, dust, blind curves, potholesPrimarily gravel. Can be very dusty in summer and muddy/slippery after rain. Lower speeds recommended. Generally accessible, but a 4x4 provides more comfort and stability.

Fuel Stations

NameLocationDistanceHoursPayment
YPF San Martín de los AndesAvenida Koessler 19441 km24/7Cash, Credit Card (Visa, Mastercard), Debit Card
AXION Energy San Martín de los AndesRuta Nacional 40 km 22062 km24/7Cash, Credit Card (Visa, Mastercard), Debit Card
YPF ACA Automóvil Club ArgentinoRuta 40 & Cnel. Díaz0.5 km06:00 - 22:00Cash, Credit Card (Visa, Mastercard), Debit Card, ACA Card
AXION Energy Junín de los AndesRuta Nacional 40 y Ruta Provincial 2340 km (from San Martín)24/7Cash, Credit Card (Visa, Mastercard), Debit Card

Maximum Fuel Gap: Approximately 110-150 km. While there are stations in major towns, long stretches on RN40 towards Villa La Angostura or further north can be without services. Always fill up before embarking on longer scenic routes.

Speed Limits

Urban

40 km/h

Rural

80-110 km/h (Paved routes)

Gravel

30-60 km/h (depending on condition)

Enforcement

Speed limits are enforced by radar guns, especially on RN40. Police checkpoints are common, particularly during peak seasons or holidays. Always carry original driver's license, vehicle registration, and proof of insurance. Headlights must be on at all times, even during the day.

Vehicle Requirements

Minimum Recommended:SUV

Explanation: While a sedan can manage paved routes like the Seven Lakes, an SUV offers greater ground clearance and comfort for gravel roads (ripio) and less-traveled paths like RP62 or RP48. If you plan to explore beyond the main paved roads, an SUV is highly recommended. For winter driving or remote exploration, a 4x4 with appropriate tires is ideal.

Winter Requirements: Winter tires (M+S or dedicated snow tires) are strongly recommended or even legally required on some roads during winter (June-September). Check local regulations. High ground clearance is beneficial for snow accumulation.

Snow Chains: Snow chains are often mandatory on access roads to Chapelco Ski Resort and some mountain passes (e.g., Paso Córdoba, sometimes RP62) during heavy snowfall in winter. Rental car companies may offer them or they can be rented locally. Know how to fit them before you need them.

Driving Hazards

Wind

Patagonian winds can be extremely strong, especially during spring and summer (October-March). Expect sudden gusts that can affect vehicle stability, particularly for taller vehicles. Drive defensively and be prepared to correct your steering.

Animals

Frequent animal crossings are a major hazard. Watch out for cattle, sheep, horses, and wild animals (deer, guanacos, hares) on rural and even some paved roads, especially at dawn, dusk, and night. Collisions with animals are common and dangerous.

Flooding

Heavy rains can cause localized flooding, particularly on unpaved roads and low-lying areas. Gravel roads can become muddy and slippery, or develop deep potholes. Check weather forecasts, especially in autumn and spring.

Ice

From late autumn through early spring (May-October), black ice and compacted snow are serious hazards, especially on shaded sections of mountain roads and bridges. Temperatures can drop quickly. Always drive cautiously and reduce speed significantly.

Gravel

Ripio (gravel) roads are common. Loose gravel can reduce traction, leading to skidding if cornering too fast or braking abruptly. Washboarding can cause vibrations and loss of control. Drive slower, maintain a safe distance from other vehicles to avoid stone chips, and be aware of dust reducing visibility.

Seasonal Conditions

Summer

Warm, sunny days. Roads are generally dry and in good condition. Ripio roads can be very dusty and prone to washboarding. Peak tourist season, so expect more traffic.

Tips: Book accommodations and car rentals in advance. Carry plenty of water. Be aware of increased traffic and dust on gravel roads. Watch for animals, especially on less-traveled routes.

Autumn

Cooler temperatures, stunning fall foliage. Generally good driving conditions, but rain can make gravel roads muddy. Days shorten, and temperatures can drop rapidly towards winter.

Tips: Enjoy the colors! Be prepared for cooler weather and potential rain. Road conditions on ripio can become more variable. Watch for early morning frost on shaded sections.

Winter

Cold temperatures, heavy snowfall, and ice are common. Many mountain passes and access roads to ski resorts require chains or 4x4 vehicles. Visibility can be poor due to snow or fog.

Closed Roads:
Paso Córdoba (RP63) often closes due to snow. RP19 to Chapelco may require chains or close temporarily during heavy snowfall. Some higher elevation provincial roads.

Tips: A 4x4 with winter tires is highly recommended. Carry snow chains and know how to use them. Check road status (Estado de Rutas) before departure. Drive slowly and increase braking distance.

Spring

Thaw season with melting snow, leading to muddy and potentially damaged gravel roads. Unpredictable weather with a mix of sun, rain, and occasional late snowfall. Strong winds are common.

Tips: Be prepared for variable conditions. Gravel roads can be particularly challenging due to mud and potholes from the thaw. Winds can be very strong. Check forecasts daily.

Emergency Information

Breakdown

For minor breakdowns, many towns have mechanics. For rental cars, contact your rental agency's roadside assistance first. In rural areas, help can be hours away. Always carry basic tools, water, and extra fuel. The Automóvil Club Argentino (ACA) offers roadside assistance for members.

Police

Emergency number for Police (Policía): 101. For general assistance, look for 'Gendarmería Nacional' (national police) posts, especially near borders and on major routes.

Towing

If your rental car company's assistance isn't sufficient, local towing services ('grúa' or 'remolque') can be found in San Martín de los Andes. Costs can be high, especially from remote locations. Ensure your insurance covers towing.

Cell Coverage

Cellular coverage is generally reliable within San Martín de los Andes and along major paved routes like RN40 (Seven Lakes). However, coverage becomes sparse or non-existent on many gravel roads, remote areas, and mountain passes (e.g., RP62 towards Hua Hum, RP48 to Lolog). Carry a physical map and inform someone of your route.

Parking Guide

In San Martín de los Andes, parking in the central area is generally paid using a 'Sistema de Estacionamiento Medido' (SEM). You can purchase parking time through an app or at various local businesses (kioskos). Outside the central grid, parking is typically free on the street, but always check signs. Overnight parking is usually permitted on public streets unless otherwise marked. For secure, off-street parking, check with your accommodation provider; many hotels offer private parking.

Rent the Right Car for Patagonia's Roads

Choose a vehicle suited to the road conditions at your destination. We offer SUVs, 4WDs, and all-terrain vehicles for every route.

Rent the Right Car for Patagonia's Roads

Explore More

Discover more guides and resources for this destination

Frequently Asked Questions

Is a 4x4 necessary for driving around San Martín de los Andes?

Not strictly necessary for all trips, but highly recommended if you plan to explore gravel roads (ripio), especially beyond the main paved routes. For the Seven Lakes Route in summer, a regular SUV is sufficient. In winter, a 4x4 with winter tires and chains offers the best safety and access.

Do I need to carry snow chains for winter driving?

Yes, absolutely. Snow chains are often mandatory for roads to Chapelco Ski Resort and some mountain passes during winter (June-September). Even if not mandatory, it's wise to carry them and know how to fit them, as conditions can change rapidly.

What documents do I need to carry while driving in Argentina?

Always carry your original valid driver's license (international driving permit recommended for non-Spanish licenses), vehicle registration (cédula verde or azul if applicable), proof of insurance, and your passport or DNI. Your headlights must be on at all times.

How often should I fill up my fuel tank?

Always keep your tank at least half full. Fuel stations can be sparse between towns, with the maximum gap around 110-150 km. It's best practice to fill up whenever you see a station, especially before embarking on a long scenic drive.

Are there many animals on the roads?

Yes, animal crossings are a common hazard, especially on rural and less-traveled routes. Be vigilant for cattle, sheep, horses, and wild animals like deer and guanacos, particularly at dawn, dusk, and night. Drive cautiously and anticipate their presence.

What's the best way to handle gravel roads (ripio)?

Reduce your speed significantly (30-60 km/h), avoid sudden braking or steering, and maintain a safe distance from other vehicles to minimize stone chips. Be aware of washboarding (corrugations) which can make your car vibrate violently. High ground clearance and an SUV or 4x4 make for a much more comfortable experience.

Is cell phone coverage reliable in the region?

Coverage is generally good in San Martín de los Andes and along the main paved sections of RN40. However, it becomes very spotty or non-existent in more remote areas, on many gravel roads, and mountain passes. Don't rely solely on your phone for navigation or emergencies in these areas.

San Martín de los Andes

|