Warburg Nature Reserve and Berrick Trench loop from Nettlebed — Chiltern Hills

Embark on the Warburg Nature Reserve and Berrick Trench loop from Nettlebed, a moderate hike spanning 4.5 miles (7.3 km) with an elevation gain of 513 feet (156 metres), typically completed in about 2 hours and 4 minutes. This route guides you through the varied landscapes of the Chiltern Hills, combining peaceful woodlands, open grasslands, and rolling terrain. You will experience easy walking on well-maintained paths, passing through the rich biodiversity of Warburg Nature Reserve, where you might spot vibrant wildflowers like bluebells in spring or orchids in summer.

When planning your visit, be aware that some sections, particularly near the Warburg Nature Reserve Visitor Centre, can become muddy after rain, so appropriate footwear is advisable. The trail offers a mix of paved roads, tracks, and natural field and woodland paths, providing a diverse walking surface. This route is largely stile-free, which makes it more accessible for many hikers. Consider starting your hike from the Visitor Centre, which also offers picnic tables.

This trail is notable for showcasing two Sites of Special Scientific Interest: Warburg Nature Reserve and Berrick Trench. Warburg Nature Reserve is the largest reserve managed by the Berks, Bucks and Oxon Wildlife Trust, covering 262 acres (106ha) and boasting exceptional biodiversity, including over 400 species of fungi and 15 identified orchid species. The route provides a quintessential Chilterns experience, characterized by ancient woodlands and unique chalk grasslands, and is known for its diverse wildlife, from dormice to rare butterflies.