The Adventure Syndicate invites you to join us and ride a century on Saturday 15 July.
We are suggesting you attempt either 100 miles on road, or 100 kilometres off road, but there are no rules.
If you've never ridden a century before, now is your chance to challenge yourself. If you're preparing for an endurance race, treat it as a training ride.
There are group rides heading out from Leeds, Mid Wales, Bristol, Edinburgh, London and Aviemore. You can find out more details for each of these, help with the planning, and let us know if you can join us, on the Facebook group here (apologies if you're not on Facebook - just drop us a line and we can email details).
We'd also love to hear from people doing their own century ride, alone or with friends. Please let us know by email, on Facebook, or by tweeting us with #TAS100.
Part of the reason we're doing this is to support Cycling UK's Women's Festival of Cycling. Throughout July, they are celebrating women who cycle - so join in with the celebrations, and get on your bike!
Wherever you are, whatever bike you own, however many centuries you have or haven't ridden in the past, we can't wait to ride with you!