River Grade Classification
Classification of Rapids (An international rapid grading system)
River rapids' grades are approximate, rather than a definitive measure of a rapid's seriousness, difficulty, or degree of danger. These grades are as used for our New Zealand Rafting trips.
Grade 1
Rapids are small, regular waves and an easy passage to pass through with no obstructions.
Grade 2
Rapids have regular, medium sized waves. The passage to pass through is generally unobstructed, although there may be some rocks or obstacles.
Grade 3
Rapids with fairly high waves (1-2 metres). There will be some definite river features such as strong eddies, stopper waves, exposed rocks, small drops. A passage may be harder to recognise and some manoeuvring is required to negotiate.
Grade 4
Difficult rapids with high, powerful, irregular waves, definite river features broken and boily water. Some hazards. The passage is often hard to recognise and precise and sequential manoeuvring is required.
Grade 5
Very powerful rapids and strong current. There may be numerous obstacles. Precise, powerful sequential manoeuvring is required. A definite risk to personal safety exists.
Grade 6
Near impossible to navigate. Life threatening.