The Louth school followed up their netball title a few weeks previously with victory at the Year 5 and 6 athletics event for larger schools, held at Monks Dyke Tennyson College.
Pupils were tested over a range of track and field events including triple jump, speed bounce and javelin as well as a variety of relay races including an over and under obstacle course.
Four local schools took part with St Michael’s running out clear winners with a total of 254 points.
Caistor Primary School were 34 points back in second position, while Lacey Garden Junior School finished in third with 110, and Holton-le-Clay Junior School were fourth on 80 points,
St Michael’s now progress through to the county finals to be held in the next few months.