The Axe & Compass pub will host a special fundraising event on Saturday to support Help for Heroes.
Sophie Baczynski and Jimi Sweeting, both of Leighton, will travel to South America in September to take on the Inca Trail trek challenge.
They are aiming to raise £8,000 for Help for Heroes and previously organised a gig at the Kiln Farm pub in Milton Keynes.
The upcoming event at the Leighton Road, Heath and Reach pub, starts at 12noon and will feature a bouncy castles, an ale festival, a battle of the bands and plenty more. Sophie and Jimi will also gratefully receive donations of prizes for an auction from local businesses.