TrailSpace Tunnel Run takes you to the instagrammable "Space Tunnel” followed by a chain of 4 famous mountains in Yuen Long area, namely Ho Hok Shan (149m), Cheung Ngau Shan (220m), Tseng Hang Shan (235m), Sze Pai Shek Shan (290m).
Although the course does not have big climbs and difficult elevation profile, running up and down these 4 mountains in on
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