Trail Grades

IMBA

All our trails are in the process of being upgraded to the IMBA Signage Standards. Below are the sign grades you can expect to see on the trail. Please also see the Rules of Trail which apply to all our MTB Trails.

White CircleIMBA_GREEN_EASYIMBA_BLUE_INTERMEDIATEIMBA_BLACK_EXPERTIMBA_BLACK_EXTREME
Trail Widthmin 2.2m min 1mmin 750mmmin 350mmmin 185mm
Tread SurfaceHardened or surfaced Firm and stable Mostly stable with some varialilityWidely variableWidely variable and unpredictable
Average Trail GradeLess than 5%5% or more10% or less15% or less20% or more
Maximum Trail GradeMax 10%Max 15%15% or greater15% or greater15% or greater
Natural Obstacles & Technical Trail Features (TTF)NoneUnavoidable obstacles 50mm tall or less.
Avoidable obstacles may be present.
Unavoidable bridges 0.9m or wider
Unavoidable obstacles 200m tall or less.
Avoidable obstacles may be present.
Unavoidable bridges 0.75m or wider.
TTF's 0.6m high or less, width of deck is greater than 1/2 the height.
Unavoidable obstacles 400m tall or less.
Avoidable obstacles may be present.
May include loose rocks.
Unavoidable bridges 0.6m or wider.
TTF's 1.2m high or less, width of deck is greater than 1/2 the height.
Short sections may exceed criteria.
Unavoidable obstacles 400m tall or greater.
Avoidable obstacles may be present.
May include loose rocks.
Unavoidable bridges 0.6m or wider.
TTF's 1.2m high or less, width of deck is less than 1/2 the height.
Many sections may exceed criteria.