We had an email asking for details of how to go about horse riding in Windsor.
http://www.tallyhostables.co.uk/ offer regular rides through the park.
The great park is excellent for horse riding with many miles of bridleway and very few cars on tarmac roads. You get fabulous views, lots of fresh air and the delights of unfettered hacking around miles and miles of rolling English countryside.
Our tip is to definitely include a stop at the fox and hounds at Bishopsgate. They provide hay and water for horses and beer for riders.