Brother and Sister, William and Hermione Wright ran in the Inter-Counties Cross-Country Championships at Cofton Park, Birmingham on Saturday.
The Boston siblings each competed in fields of more than 200 competitors.
Under 15 Hermione ran over 4,000m and under 13 William competed over a 3,000m distance.
The course undulated but produced fast times despite the very muddy patches.
Hermione then went on to represent Lincolnshire’s under 15 girls’ hockey team at Bedford on Sunday, playing in the winning team against Bedfordshire.
Hermione will be competing in the Lincolnshire Schools Cross-Country Championship at Castle Donnington this Saturday.