Cambridge to Grafham Water Loop via NCN 51

This 89 km (55 mile) loop is rated as difficult, requiring very good fitness due to its length and varied terrain. While some sections, like the loop around Grafham Water, are easier, the full route includes unpaved and potentially challenging segments that may require pushing your bike.

The route features a diverse mix of surfaces. You'll find smooth tarmac on traffic-free sections like the Guided Busway between Cambridge and St Ives. However, other parts, especially around Grafham Water, include compacted limestone, farm tracks, and gravel paths. These unpaved sections can be rough, rutted, or muddy after rain. Some segments also use minor roads.

You'll encounter a mix of natural beauty and historical sites. Highlights include the picturesque Grafham Water, England's 8th largest reservoir, and nature reserves like Fen Drayton Lakes Visitor Area. Don't miss the historic St Ives Bridge and Chapel, a unique 15th-century structure.

You can start the loop from Cambridge Railway Station, which offers good public transport links. Parking options are available in Cambridge, though it's advisable to check specific car park locations and fees. Alternatively, you could start and park at Grafham Water, which has dedicated parking facilities.

While the route primarily follows cycle paths and some minor roads, specific regulations for dogs can vary. Dogs are generally welcome on the Grafham Water perimeter path, usually on a lead. However, some nature reserves like Fen Drayton Lakes Visitor Area may have restrictions or require dogs to be on leads to protect wildlife. Always check local signage.

No, you do not need any special permits or pay entrance fees to cycle the Cambridge to Grafham Water Loop via NCN 51. Access to the cycle paths and public roads is free. However, parking at certain locations, such as Grafham Water, may incur a charge.

Spring and summer generally offer the most pleasant cycling conditions with warmer weather and longer daylight hours. However, be aware that some unpaved sections can become muddy after rain, especially in wetter seasons. Autumn can also be beautiful with changing foliage. Always check the weather forecast before you go.

Yes, there are several opportunities for breaks. You'll find cafes and facilities at Grafham Water, which makes for an excellent midpoint stop. The route also passes through charming towns like St Ives, offering pubs and cafes. Riverside Park near Cambridge is another good spot for a break.

Given the mixed terrain, a touring bicycle or a hybrid bike with wider, more robust tires would be ideal. While road bikes might manage the paved sections, the gravel paths and potentially rough farm tracks, especially around Grafham Water, could be challenging. A mountain bike would also be suitable, though perhaps slower on the tarmac sections.

Yes, the Cambridge to Grafham Water Loop primarily follows NCN 51 for about 58% of its length. It also briefly intersects with sections of the Cambridge secondary cycle network, Cambridge signed cycle routes network, Pathfinder Way, and the Three Shires Way.

Absolutely. While the full loop is difficult, you can easily adapt it. A popular option is to cycle just the circular route around Grafham Water itself, which is mostly paved, traffic-free, and suitable for all skill levels. You could also cycle the smooth, traffic-free section along the Guided Busway between Cambridge and St Ives as an out-and-back ride.