all on road..? as there is a fantastic almost unknown hard packed/gravel track between Staines Junction 13, and Junction 14. Goes right along the M25, and for years despite being local, never knew how to get on it....
That route is a public bridleway. I've been along it a few times and I think I've only ever met one other person. It's definitely not busy!
Heading south you can hug the M25 (to the point of riding along the exit ramp) over the Thames and into Egham. From there you can get to J11 still staying pretty close. Not too sure what you would need to do from there or from J14 heading north. It's not something I've ever tried to do!
That route is a public bridleway. I've been along it a few times and I think I've only ever met one other person. It's definitely not busy!
Heading south you can hug the M25 (to the point of riding along the exit ramp) over the Thames and into Egham. From there you can get to J11 still staying pretty close. Not too sure what you would need to do from there or from J14 heading north. It's not something I've ever tried to do!