Atal Tunnel Manali: South Portal, History & Travel Guide

Introduction

The Atal Tunnel, named after former Prime Minister Atal Bihari Vajpayee, is an extraordinary modern engineering marvel situated near Manali in Himachal Pradesh. Stretching a staggering 9.02 kilometres through the Pir Panjal Range of the Himalayas at an altitude of over 10,000 feet (3,060 metres), it is recognized as the **world's longest single-tube highway tunnel above 10,000 feet**.

The South Portal of the tunnel is located approximately 25 kilometres north of Manali near Dhundi. Entering the horseshoe-shaped South Portal from the lush green pine forests of the Kullu Valley and emerging just 10 minutes later out of the North Portal into the stark, dry, snow-peaked landscape of Lahaul Valley is a magical experience that leaves every traveler spellbound.

By bypassing the hazardous Rohtang Pass, the tunnel reduced the travel distance between Manali and Keylong by 46 kilometres and reduced travel time by nearly 4 hours, providing all-weather year-round connectivity. Today, visiting the South Portal and driving through Atal Tunnel is an essential highlight for anyone traveling to Manali.

Why Visit Atal Tunnel (South Portal)?

• World's longest single-tube highway tunnel built above 10,000 feet elevation (9.02 km long).
• Iconic engineering marvel constructed by the Border Roads Organisation (BRO).
• Provides seamless year-round access to the breathtaking Lahaul and Spiti Valleys.
• Experience the dramatic environmental shift from green Kullu forests to cold desert Lahaul landscapes in 10 minutes.
• Surrounded by towering snow-capped Pir Panjal mountain peaks and pristine alpine rivers.
• No special NGT vehicle permit required unlike Rohtang Pass.
• Located close to Solang Valley and Sissu waterfall in Lahaul.

History & Construction

The vision for a tunnel beneath Rohtang Pass was conceived in the 1860s during British rule, but serious planning began in 2000 under Prime Minister Atal Bihari Vajpayee. Constructed by the Border Roads Organisation (BRO) in collaboration with Shapoorji Pallonji and Strabag, engineers overcame extreme challenges including heavy water ingress from the Seri Nala fault zone and sub-zero temperatures. Inaugurated by Prime Minister Narendra Modi in October 2020, it revolutionized connectivity in North India.

Main Attractions

South Portal Entrance & Viewing Deck

The architectural horseshoe entrance of the South Portal features a grand commemorative arch against snow-capped peaks.

9.02 km Tunnel Drive

Driving inside the tunnel features state-of-the-art ventilation, emergency telephone booths every 150m, fire hydrants, and CCTV monitoring.

North Portal (Sissu, Lahaul)

Emerging at the North Portal unlocks Sissu village in Lahaul, famous for Sissu Waterfall, frozen lakes, and wooden bridges.

Best Time to Visit

Best Season: Year-round destination. March to June offers pleasant weather; December to February offers heavy snow cover around the portal.

Entry Fee & Timings

Entry Fee: Free (No toll or NGT permit required for general cars) | Timings: Open 24 Hours (Subject to weather/safety checks).

Things to Do

• Drive through the 9.02 km Atal Tunnel from South to North Portal.
• Photograph the snow-capped Pir Panjal peaks around the South Portal entrance.
• Visit Sissu Waterfall and Lahaul Valley immediately after exiting the North Portal.
• Combine your tour with Solang Valley adventure sports.

How to Reach

By Road: 25 km north of Manali town via Solang Valley road. Accessible by taxi, private car, or local HPSTC bus.

Nearby Attractions

• Sissu Village & Waterfall (15 km from South Portal via tunnel) — Scenic Lahaul valley spot.
• Solang Valley (12 km) — Paragliding and skiing hub.
• Koksar (20 km via tunnel) — Famous snow play area in Lahaul.

Travel Tips

• Observe the strict 60 km/h speed limit inside the tunnel; overtaking is banned.
• Do not stop or park inside the tunnel tube (monitored by 24/7 CCTV cameras).
• Carry warm winter clothes; temperatures drop rapidly as you exit into Lahaul Valley.

Quick Facts

Location: Dhundi / Manali, Kullu District, Himachal Pradesh | Length: 9.02 km | Altitude: 10,040 ft

Famous For: World's Longest High-Altitude Highway Tunnel, BRO Engineering Marvel, Lahaul Gateway

Google Maps URL: https://www.google.com/maps/search/Atal+Tunnel+South+Portal+Manali+Himachal+Pradesh

Frequently Asked Questions

Is a permit needed to drive through Atal Tunnel?

No permit is required for driving through Atal Tunnel.

Final Thoughts

Atal Tunnel is a triumph of Indian engineering that opens up the magical world of Lahaul to every traveler.

Optimized 1-Day & 2-Day Travel Itineraries

To help you experience the very best of Atal Tunnel Manali at a comfortable pace, here is a structured step-by-step itinerary covering morning highlights, afternoon cultural exploration, and golden hour viewpoints:

Authentic Regional Food & Local Delicacies

While exploring Atal Tunnel Manali, indulge in authentic regional cuisine. Savor traditional multi-course thalis featuring regional breads (Rotla/Bhakri/Puri), rich seasonal vegetable curries, freshly churned buttermilk (Chaas), and famous regional sweet delicacies.

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Written by

Bharat travel guide

Passionate about discovering the world's most beautiful stories. Specializes in cultural deep-dives, breathtaking landscapes, and the art of travel journalism. Follow my journey on social media.