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TUNNEL 100K-2026

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Betong Mongkollit Tunnel → Betong Clock Tower

Distance
91 km
Ascent
+4,015 m
High point
1,163 m
Life bases
2
drop bag
2
Stations
9
Time limit
≤ 24 h
Start
04:00 AMSat, May 2
Create a broadcastOfficial website

The course

The whole race, as a ridgeline

▲ 1,163 m
Start0 kmA4 Ten-Thousand Flower Garden46.4 km · Sat 04:00 PMA5 Piyamit Tunnel57.5 km · Sat 08:00 PMA8 Betong Hot Spring65.2 kmFinish91.3 km · Sun 04:00 AM

● life base◆ drop bag▲ high point

The climbs

The climbs that decide the day

  1. 01

    km 15.1

    3.9 km+387 m9.9 %

    crest at km 15.1

  2. 02

    km 28.1

    5.7 km+294 m5.2 %

    crest at km 28.1

  3. 03

    km 32.1

    2.2 km+500 m22.3 %

    crest at km 32.1

  4. 04

    km 42

    6.3 km+591 m9.4 %

    crest at km 42

  5. 05

    km 51.8

    1.4 km+306 m22.5 %

    crest at km 51.8

The course

On the map

TUNNEL 100K-2026 2026Open the full-resolution map

The roadbook

Stations

Every station on the course. Life bases carry a barrier clock in race-local time.

  1. Betong Mongkollit Tunnel

    46.4 km to A4 Ten-Thousand Flower Garden

    0 km277 m

    1. A1 Kapae Hulu School11.2339
    2. A2 Suan Palm Resort21.6310Sat 10:00 AM
    3. A3 Ai Yoe So Village35.8462

  2. A4 Ten-Thousand Flower Garden

    drop bagcrew11.1 km to A5 Piyamit Tunnel

    46.4 km839 mCloses Sat 04:00 PM

  3. A5 Piyamit Tunnel

    life basecrew7.7 km to A8 Betong Hot Spring

    57.5 km623 mCloses Sat 08:00 PM

  4. A8 Betong Hot Spring

    life basecrew26.1 km to Betong Clock Tower

    65.2 km294 m

    1. A9 Thumthong Temple81.2408Sun 02:00 AM

  5. Betong Clock Tower

    drop bagcrew

    91.3 km276 mCloses Sun 04:00 AM

Course data verified September 18, 2026