If in the Stratford area, we highly recommend dipping just south to get a taste of running in the Cotswords. A designated Area of Natural Beauty, the Cotswolds are known for their gorgeous rolling hills, farms, medieval villages, and grass roofed homes. The area is 25 miles across and 90 miles long, stretching from just south of Stratford-upon-Avon southwest to Bath. There are countless small roads, paths, and recommended walks that are great for running.
A good running option is the Cotswold Way, the northern end of which starts at Chipping Campden, near Stratford. The well-marked, runnable path heads south for 105 miles, ending in Bath. An attractive section is the 6 miles from Chipping Campden to Broadway. The Trail takes you out on to the Cotswolds escarpment with stunning views from Dover’s Hill, then continues across the fields to Broadway Tower and then down into the village of Broadway with its historic connections with the Arts & Crafts movement.
This article is a good overview of the Cotswold Way. Or consult this official Cotswold site for more information about the area. Fun fact: the record for running the Cotswold Way is 19 hours, 3 minutes.