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Built on bad decisions in Boulder, CO.

Borneo Ultra-Trail Marathon

4 Race Events50K, 100K, 50K, 10K

Borneo Ultra Trails Sdn. Bhd.

Kiulu, Sabah, Malaysia

Borneo Ultra Trail Marathon 100 km

Borneo Ultra Trail Marathon 100 km

Apr 11, 2026

Borneo Ultra Trail Marathon 30 km

Borneo Ultra Trail Marathon 30 km

Apr 11, 2026

Borneo Ultra Trail Marathon 55 km

Borneo Ultra Trail Marathon 55 km

Apr 11, 2026

Borneo Ultra Trail Marathon 9 km

Apr 12, 2026