Wheelchair friendly places to visit in the Lake District
Grange-over-Sands Promenade
This has blue badge parking right next to the promenade and then it is a lovely walk along the sea-front with a cafe to stop at on the front. Parking is next to the Commodore Inn, which serves delicious pub food.
Holker Hall is a magnificent home, cafe and gardens. They have push wheelchairs available there (call ahead to reserve), everything there is accessible to wheelchair users with lovely food, tea and cakes.
Whinlatter Forest owned by Forestry England and somewhere I thoroughly enjoyed visiting. They really are dedicated to making the forest experience available to everybody, with all terrain trampers available for hire.