CTC off-road trail grades

A grading system for way-marked off-road cycling trails has been adopted in the UK, and is used by official bodies such as the Forestry Commission and IMBA-UK. It was originally developed by Cyclists' Touring Club (CTC) employee Colin Palmer in June 1999, based on a system widely used for grading cross-country skiing routes.

A solitary major hazard (e.g. one steep hill or a difficult junction) will not necessarily raise an otherwise 'Easy' route into a 'Difficult' one.

UK Trails by Grade

evere

* The Forest of Ae: Ae Downhill Course (part of 7stanes project)
* Afan Forest Park: Skyline Trail
* Ampthill Forest: Dual Slalom Downhill Course
* Coed-y-Brenin: Red Bull Trail and Karrimor Trail
* Cwmcarn: Y Mynydd Mojo
* Dalby Forest
* Glentress Forest: V-Trail
* Guisborough Forest
* Hamsterley Forest
* Hopton Wood
* Innerleithen Forest: Forestry Commission/Red Bull Project Downhill
* Machynlleth: Cli-Mach-X
* Thetford Forest

Difficult

* The Forest of Ae: Ae Line (part of 7stanes project)
* Afan: White's Level, Penhydd Trail, & The Wall
* Argyll Forest Park: Glenbranter Cycle Splash & Ardgartan Peninsula Circuit
* Ben Aigan: Blue Cycle Trail
* Brechfa: Abergorlech Red Trail
* Coed-y-Brenin: MBR Trail & Sport Trail
* Cwmcarn: Twrch Trail
* Dalby Forest: Red Cycle Trail
* Durris Forest: Cairn Spur
* Fetteresso Forest: Drumtochty Through Route Forest Trail & Bervie Loop Forest Trail
* Forest of Dean: FODCA Trail
* Gartly Moor Forest: Red Trail & Blue Trail
* Glentress Forest: Red Grade Freeride Area & Red Grade Trail
* Great Glen Forest: Great Glen Mountain Bike Trail
* Grizedale Forest: Hawkshead Moor & Silurian Way Cycle Trail
* Gwydyr Forest: Marin Trail
* Hamsterley Forest: Neighbour Moor Tour Cycle Route & Red Cycle Trail
* Hopton Wood
* Kielder Forest: The Swinburne Collection
* Kirkhill Forest: South Spur Cycle Trail
* Llanwrtyd Wells: Esgair Dafydd Trail, Irfon Forest Route & Mynydd Trawsnant Route
* Machynlleth: Mach 3 Trail
* Nant yr Arian: Summit Trail & Syfydrin Trail
* Pitfichie Forest
* Tay Forest
* Whiteash Forest: Whiteash Loopie