It’s all very well making a commitment to get fitter, but sometimes you need a little something else to spur you on. If that something is raising cash for a good cause while you hone your muscles by running up stairs, swimming in the sea or racing to the top of Snowdon under moonlight, then these charitable events might help you reach your fitness goals – and give you a pang of pride that you’re doing some good, too.

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Race The Sun Lake District

You have from sunrise to sunset to complete this unique triathlon, a fundraiser for Action Medical Research For Children. That works out at roughly 14 hours of daylight to complete an 80km cycle, hike to the top of England’s second-highest mountain, Helvellyn (950m), and canoe 3km on Lake Thirlmere. You’ll be working as a team of four, so recruit three pals and get training. 2nd September, sign up at action.org.uk/race-sun

MS Society Ride Across Britain

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This one’s a whopper. A real bucket list ticker. The world-famous Land’s End to John o’ Groats pedal-powered nine-dayer, taking in 969 miles (1,560km) of Great British scenery through 23 counties. The MS Society has put everything in place to ensure you have all the support you need to make it to the last (or first, if you’re a Caithness native) spit of our island, with overnight accommodation through the ride all taken care of. One to tell the grandkids about, for sure. And one to raise some serious dollar, as well. Starts 9th September, sign up at mssociety.org.uk

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Macmillan All Out Swim

Take to the water and swim either 2km or 5km by yourself or as part of a team. The catch is that it’s outdoor pools only in the five-event series that runs from September to October, so the water might be a tad fresh. If you can’t make it to any of the events, which all take place in the south-east of the UK, you can still participate by swimming the distance anywhere, anytime. 9th September-14th October, sign up at macmillan.org.uk

Oxfordshire Adventure Challenge

Travel along the Thames Ridgeway by foot, bike and kayak to raise money for the NSPCC. There are two versions of the challenge. The classic starts with a 10km trek along the Thames Path, before 12km of hair-raising mountain biking on the off-road trails of the Thames Ridgeway, finishing with a 1.2km kayak along the Thames itself. The extreme route amps up the distance with a 20km hike, a 24km bike ride and a 3km kayak. All equipment is included. 16th September, sign up at nspcc.org.uk

WellChild Trek The Lake District 8in48

No pressure, but WellChild (the national charity for sick children) wants you to reach the top of all the Lake District’s eight highest peaks in just 48 hours. Luckily, this two-dayer is expertly organised, taking you to the summits of Skiddaw, Helvellyn Lower Man and Helvellyn on day one, and day two – “the big one” – cramming in 12 hours of peak-to-peak walking across the final five points. We recommend making use of the free training walks on offer in the lead-up to check on how well your prep is going beforehand and to break in your shiny new hiking boots. 15th-17th September (includes meet day), sign up at wellchild.org.uk

BHF London to Brighton Off-Road Bike Ride

The British Heart Foundation claims their 75-mile city to coast mountain biking pedal pusher, “has it all”. And since Europe’s largest charity off-road cycling event includes steep forest inclines, technical descents, rocky paths and muddy single tracks, they’re not fibbing. Cough up the very reasonable £35 entry fee and raise over £100, and you not only get a marshaled route to romp over, mechanical support at all times, training tips, drinks and eats en-route, and a big finishing line party, but a bleedin’ massage once you hop out of your saddle, too. They’re talking our language. 23rd September, sign up at bhf.org.uk

Thames Bridges Bike Ride

The longest ride of the three on offer crosses 18 of London’s bridges, from Hampton Court Bridge in the south-west to Tower Bridge in the heart of the city. Cyclists on the challenge route ride 55 miles (88.5km) in total, so if that sounds too much you might fancy the classic 35-mile (56km) route, which runs from Chiswick Bridge to Tower Bridge, or even the mini eight-miler (13km) between Chiswick Bridge and Hammersmith Bridge. Whichever you choose you’ll be helping to raise funds for the Stroke Association. 1st October, sign up at stroke.org.uk

Royal Marines’ Charity Commando Series

Coming straight out of the Commando test book, this 6km or 12km test of endurance is littered with 18 of the toughest obstacles the UK’s hardiest servicemen tackle in their training. Yep, you’re right to cower in fear. There are cave crawls, mud slides and suspended river crossings to take on around Hever Castle in Kent. If you fancy going full Commando, there’s the option to make it a two-dayer thanks to an ace-sounding Bivouac Experience. 11th-12th November, sign up at commandoseries.co.uk

…Or Just Do It Yourself

If you’re not into group participation, don’t worry: technology has removed the need to actually enter a race to do good. New app Charity Miles lets you turn hard-won cyber points into currency, which you can then donate to nine charities including Autism Speaks, Stand Up to Cancer and Habitat for Humanity. Walking and running earn 25 cents (around 16p) per mile, cycling earns 10 cents per mile and corporate sponsors will donate what you’ve earned. Sign up at charitymiles.org

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