Sandlings 55

A four-round trail series on footpaths, fields, woods and some roads held across June to September. All four rounds count toward individual championship scores, with timed results, navigational questions, and t-shirts for those who complete..

A Backyard Ultra at High Lodge Thetford Forest where competitors run a 4.167 miles loop every hour until one runner completes an extra loop. Chip timing, a £1000 prize for the winner, and six- and twelve-hour entry options are available.

A country running event in Suffolk that passes through Ousden and uses road and trail routes. Distances offered: 5k, 10k, half, full and ultra, with aid stations every 10k and parking included.

Celebrate the longest day at the Summer Solstice Challenge around Abberton Reservoir, a timed loop with 5 km laps. Run as many laps as you like, earn a medal and support Essex Wildlife Trust.