Special Express 9 (Bangkok ↔ Chiang Mai)

State Railway of Thailand (SRT)
Thailand
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The Journey

Navigate from Krung Thep Aphiwat Central Terminal (Bangkok) to Chiang Mai Railway Station across a span of 751km. This is an overnight service.

Scenery Highlights
  • Doi Khun Tan National Park — the train threads the heart of the 1,373 km² protected area on the mountain section north of Lampang, with karst cliff faces, misty peaks, and dawn light over the forest canopy visible through the open windows
  • Khun Tan Tunnel — Thailand's longest railway tunnel at 1.3 km, opened in 1921 under German technical oversight, still single-bore with a dramatic moment of total darkness deep under the mountain
  • Phitsanulok foothills — the run from Phitsanulok to Uttaradit crosses the forested ridges of the lower Phetchabun / Thanon Thong Chai range, with morning mist often sitting in the river valleys
  • Chom Thong / Doi Inthanon approach — on clear mornings the spires of Doi Inthanon (Thailand's highest peak, 2,565 m) become visible roughly 50 km before arrival in Chiang Mai
  • Lamphun Sunrise — the final hour of the journey crosses the Lamphun River floodplain and the rice-bowl approach to Chiang Mai, with the gilded stupa of Wat Phra That Hariphunchai visible to the east of the line
  • Chiang Mai old-city arrival — the train crosses the Ping River trestle and pulls past the old city walls and the moat before terminating at the colonial-era Chiang Mai Railway Station (opened 1922, architecturally influenced by late-Renaissance European stations)
Quick Facts
  • Duration

    12.58 hours

  • Distance

    751 km

  • Est. Price

    THB 938 – 2,453 per passenger depending on class and berth (Second Class upper THB 938, Second Class lower THB 1,041, First Class upper THB 1,453, First Class lower THB 1,653, entire First Class private cabin THB 2,453)

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Classes & Accommodations

Meals: None — snack trolley at seat; complimentary 1.5 L drinking water per cabin

Ensuite: No

Meals: None — snack trolley service through the night

Ensuite: No

Meals: None — refreshment trolley passes every ~90 minutes

Ensuite: No

Engine / Locomotive

SRT CNR (China Northern Rolling Stock) air-conditioned diesel multiple-unit trainset, delivered from 2016 onward, paired with refurbished heritage SRT Mark II/III sleeper coaches on selected rotations; alternatively SRT diesel locomotive (General Motors GT42LOC, ALCO 251 prime mover, ~2,000 hp) hauling AC Mark II/III consist on heritage rotations

Locomotive Weight

~120 tonnes (GT42LOC diesel locomotive); ~52 tonnes per CNR power car

Track Gauge

1,000 mm (metre gauge)

Braking Technology

Air brakes (dual-pipe Westinghouse-compatible) plus electric/dynamic braking on CNR DMU; parking brakes on SRT Mark II/III sleeper coaches

Route Engineering Challenges

  • Khun Tan Tunnel — 1.3 km single-bore tunnel under Doi Khun Tan, opened 1921 with German engineering oversight, still the longest railway tunnel in Thailand; train traverses it in near-darkness at ~50 km/h

  • Single-track operation with passing loops at major stations (Nakhon Sawan, Phitsanulok, Uttaradit, Lampang) — schedule recovery after delays is constrained

  • Long northbound ascent from the Chao Phraya lowlands (~3 m elevation at Bangkok) to the Lampang plateau (~240 m) and the Ping River valley (~310 m at Chiang Mai)

  • Mountain-curve geometry on the Lampang → Lamphun section — speeds restricted to ~50 km/h through the Doi Khun Tan National Park alignment

  • Monsoon-season slope stability through the Phetchabun foothills (June–October) — SRT runs a Yearly Engineering Notice with reduced connections in the worst rain years

  • CNR trainsets delivered 2016 — relatively modern but parts sourcing from China and a periodic wheel-flat issue on the constant-braking Lampang grade have required mid-life fleet refurbishment

Route Classification

State Railway of Thailand Northern Line, Bangkok ↔ Chiang Mai

Total Distance

751 km Krung Thep Aphiwat (Bangkok) → Chiang Mai

Maximum Speed

~80 km/h on level Central Plains sections, ~50 km/h on mountain grades and through Khun Tan Tunnel

Inaugurated As Northern Line Sleeper

1922 (Bangkok – Chiang Mai Northern Line); Special Express long-distance numbering current since 1976 timetable reform

Through The Khun Tan Tunnel

Yes — 1.3 km single-bore, opened 1921, Thailand's longest railway tunnel

Rolling Stock

CNR air-conditioned DMU trainset (delivered from 2016) and heritage SRT Mark II/III AC sleeper coaches hauled by GT42LOC diesel on some rotations

Dining Car

Meals available ~50 min after departure; snack trolley throughout journey

Year-Round Operation

Daily, 365 days a year, including Thai public holidays

Crew

Driver, assistant driver, 2 conductors, 4 on-board service staff (Thai/English); 1 chef on dining-car rotations

Quick Facts
  • Duration

    12.58 hours

  • Distance

    751 km

  • Est. Price

    THB 938 – 2,453 per passenger depending on class and berth (Second Class upper THB 938, Second Class lower THB 1,041, First Class upper THB 1,453, First Class lower THB 1,653, entire First Class private cabin THB 2,453)

Official Booking Provider