Each control is worth 10 points but five points are deducted for every minute late to the finish.
Last weekend Ben Beresford and Will Parkinson competed for the East Midlands Juniors in the annual Junior Inter Regional Championships, in the New Forest.
Both did well and helped the East Midlands to a seventh place finish from the 12 regions of the UK.
This weekend will see local orienteers competing in the East Midlands Urban League event, at Stamford.
The urban environment is sure to provide tricky navigation and fast running.