4 Trails Ultra Loop, aka 4TUL, was founded in 2020. The 189km loop starts and ends at Tai Mo Shan, 95% of the 4TUL route falls within the Hong Kong 4 major trails (namely MacLehose Trail, Wilson Trail, Hong Kong Trail, and Lantau Trail). The loop is connected by public transportation and to be done on foot with 146km.

The 5th edition of 4TUL, held on 2nd March 2025, will cover Wilson Trail & MacLehose Trail. The race starts at Yau Tong and finish at Shing Mun and Tai Mo Shan for 27km and 45km respectively. .

4 Trails Ultra Loop (簡稱4TUL) 始於2020年。路線為一個大環形，總距離為189公里，起點及終點均在大帽山。 95%的4TUL路線落在香港4條主要山徑 (即麥理浩徑、衛奕信徑、港島徑及鳳凰徑) 。完成這環形路線要以公共交通工具連接，實際需要跑步的距離約為146公里。​

第五屆4TUL 將在2025年3月2日舉行。賽事共分27公里及45公里兩個距離，由油塘起步。比賽路線為先經衛奕信徑，再接麥理浩徑，終點分別設於城門及大帽山。

The 4TUL is an incredible experience – the beautiful route takes you from the heart of a country park in New Territories into the middle of city on HK Island and then back out again into New Territories via Lantau Island. 

As an enthusiastic newcomer to ultra running, I originally signed up to complete the 4-in-a-Row format only. However, after running each of the sections and loving the route, I knew I wanted to take on the full One-Go Challenge. I immediately signed up as a One Go Participant, started looking into ferry timetables and planning the logistics… It was my first time running more than 50KM in one go and my first time running solo at night, and I loved the whole experience and challenge. I can’t wait to sign up again for the 3rd Edition!