Space Tunnel Run takes you to the instagrammable "Space Tunnel”  followed by a chain of 4 famous mountains in Yuen Long area, namely Sze Pai Shek Shan (290m), Tseng Hang Shan (235m), Cheung Ngau Shan (220m) and Ho Hok Shan (149m).

Although the course does not have big climbs and difficult elevation profile, running up and down these 4 mountains in one go with sections of technical terrain requiring every ounce of concentration, and it is definitely challenging.

The race course of Space Tunnel Run 2nd edition is a newly designed route combining both road and trail running which makes the race more competitive.
 
Space Tunnel Run  比賽路線會先經過「時光隧道」，接著是連續登上元朗四座有名的山，即四排石山 (290米)、井坑山 (235米)、 掌牛山 (220米)及 蠔殼山 (149米)。

比賽路線雖然沒有太大攀升及波幅，但要一氣呵成完成包含技術性路面的四山連走，需要參賽者全神貫注，極具挑戰性。

第二屆 Space Tunnel Run 賽事加設全新設計路段，賽道結合路跑及越野跑，增加賽事競爭性。