4 十二月 - 5 十二月 | 公園定向同樂日(香港動植物公園) Park Orienteering Fun Day (Hong Kong Zoological and Botanical Gardens) | Leisure and Cultural Services Department Orienteering Association of Hong Kong, China | Hong Kong | | loc | | S | | |
5 十二月 | Pro-Active 短距離系列賽 2021 總決賽 Pro-Active Sprint Orienteering 2021 Final | Pro-Active Orienteering Club | Hong Kong | | loc | | S | | |
12 十二月 | 香港定向排名聯賽 – 中/長距離(鴨仔山) Hong Kong Orienteering Ranking League - Middle/Long(Duckling Hill) | Orienteering Association of Hong Kong, China | Hong Kong | | loc | | M | | |
17 十二月 - 19 十二月 | #AsiaCityRace #HKG - Hong Kong City Race | Metropolitan Orienteering Club | Hong Kong | | club | | L | | |
18 十二月 | 2021香港周年沿徑定向錦標賽(精確賽)暨世界排位賽 (長洲西園) Hong Kong Annual Trail Orienteering Championships 2021 (PreO) Cum World Ranking Event (Saiyuen Cheung Chau) | MOPC Orienteering Association of Hong Kong, China | Hong Kong | T | loc | | P | | |
19 十二月 | 2021 香港周年沿徑定向錦標賽 (速決賽) 暨世界排位賽 (保良局賽馬會大棠渡假村) Hong Kong Annual Trail Orienteering Championships 2021 (TempO) Cum World Ranking Event (PLK JC Tai Tong Holiday Camp) | Orienteering Association of Hong Kong, China Startrail Orienteering Club | Hong Kong | T | loc | | T | | |
19 十二月 - 26 十二月 | Hong Kong O Week 2021 (Individual) | A123 Akinalliance Apex Action Hong Kong Island Orienteering Force Metropolitan Orienteering Club MOPC Orienteering Association of Hong Kong, China Queen's College Orienteering Club | Hong Kong | | nat | | S | | |
22 十二月 - 28 十二月 | 2021年 香港野外定向會 x 台灣定向運動協會 網上沿徑定向(精確賽)系列 第六回 HKOC x TWOA Online TrailO (PreO) Series 2021 Series 6 | Hong Kong Orienteering Club | Hong Kong | T | loc | | P | | |
24 十二月 - 27 十二月 | 4th Asian Junior and Youth Orienteering Championships | Hong Kong | Hong Kong | | int | | M | | |
25 十二月 - 27 十二月 | X'Mas Orienteering Challenge Series 2021 | Y2Y Orienteering Development and Training Centre | Hong Kong | | loc | | S | | |
26 十二月 | 香港定向排名聯賽 – 中/長距離 (下花山) Hong Kong Orienteering Ranking League - Middle/Long (Ha Fa Shan) | Orienteering Association of Hong Kong, China | Hong Kong | | loc | | M | | |
27 十二月 | 香港定向排名聯賽 – 短距離(馬灣) Hong Kong Orienteering Ranking League - Sprint (Ma Wan) | Metropolitan Orienteering Club Orienteering Association of Hong Kong, China | Hong Kong | | loc | | S | | |
27 十二月 | Hong Kong O Week 2021 (Sprint Relay) | A123 Akinalliance Apex Action Hong Kong Island Orienteering Force Metropolitan Orienteering Club MOPC Orienteering Association of Hong Kong, China Queen's College Orienteering Club | Hong Kong | | nat | R | S | | |
31 十二月 | AASR-00 | Apex Action | Hong Kong | | loc | | S | | |