Seven Sisters walk via Friston Forest: Distance: 13 km. Elevation: 475 m. Difficulty: Hard  Alternative route from Seaford: Distance: 12 km. Elevation: 330 m. Difficulty: Hard  This is a fabulous if challenging Seven Sisters walk and there are two different routes depending on your preferences. You will need Ordnance Survey Explorer 25. Route 1: Seven Sisters … Continue reading Fabulous Seven Sisters Walk, East Sussex