Boston brother and sister William and Hermione Wright have been in fine form recently.
William competed against 385 other runners in the Under 13 boys race at Parliament Hill, London on Saturday.
In very muddy and hilly conditions, he made an excellent start up the steep first part of the course.
A slip and a fall saw him lose places but he completed the course, finishing strongly to be the second counter out of the six-strong Nene Valley Harriers team.
Hermione ran strongly at the Derbyshire Schools Championships at Mary St Mounts School, Spinkhill.
In wet conditions, she finished well ahead of many older girls in her race of 129 competitors to finish second scorer for South Derbyshire.
Both will represent Lincolnshire at the Inter-Counties Cross-Country Championships at Cofton Park, Birmingham on March 8.