Four WA bike tracks have been listed among the world's best 50 by a leading cycling magazine.
The list, which includes tracks in Bolivia, Canada, France, Russia, and East Timor, was based on a survey of international riders and travel writers by the Ride On magazine.
The WA rides are the Munda Biddi Trail from Mundaring to Manjimup, Rottnest Island, the Nullarbor Plain from Norseman to Ceduna and the Five Dams Challenge.
Five Dams is a 234km trek that links the five major dams in the Perth Hills and involves more than 2000m of climbing.
The challenge has grown in popularity and Bicycling WA now organises an annual pairs cycling event over the route.
"The Five Dams Challenge has become the ultimate event for many bike riders," event co-ordinator Brian Thompson said. "The course is unique and requires cyclists to utilise all their riding skills and strength.
"The satisfaction many riders achieve from completing this event, whether it takes them seven or 12 hours, is not something they are likely to forget."
This year's event, on April 12, is being sponsored by Highbury Homes and many of its employees are planning to participate.
A Three Dams Challenge - a 146km ride between Mundaring Weir, Canning Dam and Wungong Dam - will be held on the same day.
Highbury Homes director Chris Bishop said he was in training for the Three Dams Challenge, but many of his workmates were still undecided about which event to enter.
"The Five Dams Challenge is a long day in the saddle; it is very unforgiving," Mr Bishop said. "I might do it next year."