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River Difficulty Classification

River Difficulty Classification allows you, the rafter, to understand which rapids and trips are suitable for your own level of skill. While a raft company can advise you, it’s your responsibility to pick a trip that will match your abilities and give you a thrilling but safe experience. These are the standard classifications used to judge river conditions:

Class I - Easy

  • fast water with ripples or waves
  • all dangers are obvious, negligible risk to swimmers, easy self-rescue

Class II - Novice

  • straightforward rapids with regular waves
  • easy to medium drop-offs including chutes, ledges, and falls
  • eddies and shear zones are easily negotiated
  • the best passage is evident without scouting
  • Class III - Intermediate

    • rapids with moderate, irregular waves, breakers, rollers and back eddies
    • upper limit for canoes without spray cover
    • scouting in advance is advised for inexperienced parties

    Class IV - Advanced

    • high, irregular waves, breakers, powerful back eddies, whirlpools and sharp bends
    • powerful but predictable rapids requiring precise handling in difficult water and suitable for experienced paddlers only
    • moderate to high risk to swimmers, group rescue is often required
    • advance scouting is required
    • helmet, personal flotation devices and hull floatation aids mandatory

    Class V - Expert

    • extremely long and/or violent rapids, often containing large, unavoidable obstacles, holes, steep banks, and turbulent water
    • very fast currents with powerful whirlpools and boiling back eddies
    • rescue is often difficult even for experts
    • advance scouting may be difficult even for experienced rafters

    Class VI - Extreme

    • upper limit of present-day skills and equipment and only for teams of experts, taking all safety precautions
    • unexplored or uncharted rapids exist, where navigation may be classed as extremely difficult to impossible
    • Luck may be an important part of a successful negotiation of this water.

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