Grand Union Canal and Park Wood via Hillingdon Trail

Starting near Hertfordshire, England, the Grand Union Canal and Park Wood via Hillingdon Trail offers a delightful 10 km (6.2 miles) loop with an elevation gain of around 100 meters (328 feet). This medium-difficulty trail is perfect for those looking to experience a mix of serene waterways, lush woodlands, and historical landmarks.

### Getting There To reach the trailhead, you can either drive or use public transport. If driving, set your GPS to the vicinity of Harefield, a village in Hertfordshire. For those using public transport, the nearest significant landmark is the Harefield Hospital. From there, local buses or a short taxi ride will get you to the trailhead.

### Trail Overview The trail begins near the Grand Union Canal, a historic waterway that dates back to the early 19th century. As you start your hike, you'll be walking alongside the canal, where you can observe narrowboats and various waterfowl, including swans, ducks, and herons. The first 2 km (1.2 miles) are relatively flat, making it an easy start.

### Key Landmarks and Sections

#### Grand Union Canal The initial stretch along the Grand Union Canal is not just scenic but also historically significant. This canal was a crucial transportation route during the Industrial Revolution, linking London to Birmingham. Look out for old lock mechanisms and traditional canal boats, which offer a glimpse into the past.

#### Park Wood After about 3 km (1.9 miles), you'll transition into Park Wood, a beautiful woodland area that provides a stark contrast to the open canal path. The elevation begins to increase here, with gentle inclines that total around 50 meters (164 feet) over the next 2 km (1.2 miles). Park Wood is home to a variety of wildlife, including deer, foxes, and numerous bird species. The dense canopy and undergrowth make it a haven for nature enthusiasts.

#### Hillingdon Trail Around the 5 km (3.1 miles) mark, you'll join the Hillingdon Trail, a well-marked path that guides you through more wooded areas and open fields. This section offers a mix of gentle ascents and descents, contributing to the remaining elevation gain. The trail is well-maintained, but it's advisable to use a navigation tool like HiiKER to stay on track.

### Flora and Fauna The trail is rich in biodiversity. Along the canal, you'll find aquatic plants like water lilies and reeds. In Park Wood, the flora includes ancient oak and beech trees, as well as seasonal wildflowers like bluebells in the spring. The fauna is equally diverse, with opportunities to spot everything from small mammals to a variety of bird species.

### Historical Significance The Grand Union Canal itself is a historical marvel, constructed between 1793 and 1805. It played a vital role in the transportation of goods during the Industrial Revolution. Park Wood, on the other hand, has been a woodland area for centuries, offering a glimpse into England's natural history.

### Final Stretch The last 2 km (1.2 miles) of the trail loop back towards the starting point near the Grand Union Canal. This section is relatively flat and offers a relaxing end to your hike. You'll pass through a mix of open fields and small wooded areas, providing a final opportunity to soak in the natural beauty of the region.

### Preparation Tips Given the medium difficulty rating, it's advisable to wear sturdy hiking boots and bring plenty of water. The trail can be muddy in sections, especially after rain, so waterproof gear is recommended. A map or navigation tool like HiiKER will be invaluable for staying on course.

This 10 km loop offers a perfect blend of natural beauty, historical significance, and moderate physical challenge, making it a rewarding experience for any hiker.