North Downs Way

St Martha's Hill is a landmark in St Martha in Surrey, England between the town of Guildford and village of Chilworth. It is the 18th highest hill in the county and on the Greensand Ridge, in this case at the closest point to the North Downs, commencing to the immediate north at the Guildown-Merrow Down in the parishes of Guildford and Merrow.

Chilworth Manor is a historic country house located midway between Chilworth, Surrey and St Martha's Hill to the north. The manor is grade II listed by Historic England.

St Martha's Hill and Colyer's Hanger is a 38-hectare (94-acre) nature reserve north of Chilworth in Surrey. It is owned by the Albury Estate and managed by the Surrey Wildlife Trust on behalf of Surrey County Council. Colyers Hanger is a Site of Special Scientific Interest and a Nature Conservation Review site, Grade 2.