Casterton is one of the most established academic girls' boarding and day schools in the UK, with a national and international reputation.

The school is located on the borders where three counties meet, North Yorkshire, Cumbria and Lancashire. Girls come to Casterton from a wide geographical area. The school is very easily accessible from Scotland in the North and London and Manchester from the M6, which is only 15 minutes drive away. Casterton is also popular with girls from Yorkshire, due to its easy route on A59 and A65 from York, Harrogate and Ilkley.

Casterton has an outstanding academic record for scholastic excellence. Superb teaching and pastoral care together are a winning combination. Girls are also offered first class music and drama teaching, excellent sporting opportunities, at county and regional level and an ever developing extra curricular and weekend programme.