Große Dhünn and Knochenmühle via Burg Dhuenntalsperre

Starting your hike near the Rheinisch-Bergischer Kreis in Germany, this 13 km (8 miles) loop trail offers a moderate challenge with an elevation gain of approximately 200 meters (656 feet). The trailhead is conveniently accessible by both car and public transport. If you're driving, you can park near the Burg Dhuenntalsperre, a well-known dam in the area. For those using public transport, take a train to Bergisch Gladbach and then a bus to the Dhuenntalsperre stop.

### Trail Overview

The trail begins near the Burg Dhuenntalsperre, a significant landmark in the region. This dam is not only an engineering marvel but also a picturesque spot to start your journey. As you set off, you'll be greeted by dense forests and the serene sounds of nature. The first few kilometers are relatively flat, making it a good warm-up for the more challenging sections ahead.

### Key Landmarks and Points of Interest

Große Dhünn Reservoir: About 3 km (1.8 miles) into the hike, you'll encounter the Große Dhünn Reservoir. This is one of the largest drinking water reservoirs in Germany, and its clear waters are a sight to behold. The trail skirts around the reservoir, offering multiple vantage points for photography and relaxation.

Knochenmühle: Around the halfway mark, approximately 6.5 km (4 miles) in, you'll reach Knochenmühle, an old mill with historical significance. The mill dates back to the 18th century and was once a crucial part of the local economy. Although it's no longer operational, the structure has been preserved, and informational plaques provide insights into its history.

### Flora and Fauna

The trail is rich in biodiversity. As you hike, you'll pass through mixed forests dominated by beech and oak trees. In the spring and summer months, the forest floor is carpeted with wildflowers, adding a splash of color to your journey. Birdwatchers will be delighted by the variety of species, including woodpeckers, owls, and various songbirds. Keep an eye out for deer and wild boar, which are commonly spotted in this area.

### Elevation and Terrain

The trail features a mix of terrains, from well-maintained paths to more rugged sections. The elevation gain is gradual, with the steepest sections occurring around the 8 km (5 miles) mark. Here, you'll ascend approximately 100 meters (328 feet) over a short distance, so be prepared for a bit of a workout. Good hiking boots are recommended, especially after rain, as some parts can become slippery.

### Navigation and Safety

For navigation, it's highly recommended to use the HiiKER app, which provides detailed maps and real-time updates. The trail is well-marked, but having a reliable navigation tool will ensure you stay on track. Always carry enough water and snacks, as there are limited facilities along the route. Mobile reception can be spotty in some areas, so inform someone of your plans before setting off.

### Getting There

To reach the trailhead by car, set your GPS to Burg Dhuenntalsperre. There is ample parking available near the dam. If you're using public transport, take a train to Bergisch Gladbach and then a bus to the Dhuenntalsperre stop. The trailhead is a short walk from the bus stop, making it easily accessible for all hikers.

This trail offers a perfect blend of natural beauty, historical landmarks, and moderate physical challenge, making it an ideal choice for a day hike.