Co-curricular activities at Triyog Higher Secondary School are:

Assembly activities (comprising of news reading in English and Nepali; moral stories; speeches etc.) by the students take place on a daily basis.

Various Co-curricular activities are organized and encouraged in the School as necessary complements to classroom study. Most of the parents appreciate the importance of these co-curricular activities. Some, however, do not believe in them or treat them seriously and effectively discourage the participation of their children in such character building activities. The Staff consider such non-cooperation as contrary to the policy of the School and increasingly take this into account in making admission. 

• House Assembly (or rather Creative Assembly) for Senior, Middle and Junior School.
• Excursion by the middle and senior school students- both within and outside the country.
• Science, Social Studies, Art and Craft Exhibition.
• Field trips for every class
• Community Puja (Class IV only)
• Take your child to work- Day (Class VI only)
• Talk program (Class VIII only)
• Music Club
• Aerobics Club
• Modern Dance Club
• Nepali Dance Club
• Scouts
• Judo / Martial Art Club
• Pottery Club
• Theatre Club
• Media Training Club
• Triyog Championship Trophy (conducted every alternate year)
• Major production (usually a musical - every alternate year).