A Sturdy Walk is a series of 12 caches forming a circular walk of about 4 miles placed to coincide with the 2008 Dreaming Spires Cache Bash at Sturdys Castle. This is a family friendly walk (although you may struggle with a buggy in some parts) with not too much in the way of hills and roads, and no Micro's 
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The co-ords given above are for a suitable parking spot in a lay bye on the A4260 Banbury Road. To find the co-ords for the bonus cache you will need to collect the Letters and Numbers in the “A Sturdy Walk” caches, or collect them by answering the questions in the Additional Waypoints below. Once you have collected all of the required info, substitute the letters in the formula below for the numbers you have collected.
N 51° 5E.J(E+D)(C+H) W 001° 2F.(A-K)(G-J)(B-L)