This should be clearish if you look at an OS map, but I can add more detail if you need it. A good chunk of the first 4 miles or so is cheeky, but well ridden by locals.
From Summerhill School, head south through Ridgehill Woods, Friars Gorse, over canal and up through outskirts of Wollaston. South through woods above Stourbridge Rugby club and then across playing fields opposite school to Little Iverley Covert.
Along Sandy Lane and then up Sugar Loaf Lane past Raquet Club, then down bridleway through Fairy Glen. Follow road to Caunsall then onto Kinver Edge via Blakeshall.
After exploring the Edge, head towards Enville via Rocky Lane and two bridlepath sections. From Enville go east through the Million, decending the bridleway to Gothersley Lane and the canal.
Head to Gothersley Bridge, then along the lane and past Ashwood Nursery. Use the bridleway past Ashwood Lodge to get back to the school.