The furthest and least direct of these four extensions, and the one that rewards the most patience: proper fells, proper lakes, and enough scale that four nights barely feels like plenty.
The Lakes and Fells
Windermere, Ambleside and Keswick each offer a different pace, from a flat lakeside stroll to a genuine fell walk for legs that have had the full four nights to recover. October weather in the Lakes is genuinely unpredictable, so build flexible, shorter walks into any plan rather than committing to a fixed itinerary in advance.
Getting Around
A car makes the Lake District considerably easier to move around than public transport does, though bus services connect the main towns for anyone travelling without one. Distances between bases can be longer than they look on a map, so plan driving time generously.
Where to Stay
Windermere and Ambleside both offer a wide range of accommodation and are well placed for exploring the central lakes without committing to a single, harder-to-reach valley.
Getting Back
Return to Chester requires the same rail changes or driving as the outbound trip; check connections in advance given the more rural transport links involved.