This was one of the special events in 2023 in celebration of BBN's 40th anniversary.  
We walked the 51 mile Northampton Round as 7 circular day walks, led by Dave Findel-Hawkins 

Thursday 18th May             Part 1  Piddington to Stoke Bruerne
Thursday 15th June            Part 2  Cogenhoe to Piddington
Thursday 13th July             Part 3  Holcot to Ecton (missing link - rain - Ecton to River Nene at Cogenhoe)
Thursday 10th August        Part 4  Chapel Brampton to Holcot
Thursday 24th August        Part 5  The M1 near Bugbrooke Mill to Church Brampton
Thursday 14th September  Part 6  Blisworth to the M1 near Bugbrooke Mill
Thursday 12th October       Part 7  Stoke Bruerne to Blisworth

Here is the link to the routes of all the legs, plus the overall.   https://www.flickr.com/photos/60620372@N07/albums/72177720311932054

Here is the Northampton Round certificate for anyone who walks a missing section(s) and wants to personalise their certificate by altering the date.  Certificate

Well done on completing the Round!