Heiligenberg and Heidenknörzel via Camino Incluso and Keltenweg

Starting near Heidelberg, Germany, this 10 km (6.2 miles) loop trail offers a moderate challenge with an elevation gain of approximately 500 meters (1,640 feet). The trailhead is conveniently accessible by public transport or car. If you're using public transport, take a train to Heidelberg Hauptbahnhof and then a bus to the Philosophenweg stop. From there, it's a short walk to the trailhead. For those driving, parking is available near the Philosophenweg.

### Initial Ascent and Camino Incluso

The trail begins with a gradual ascent through dense forest, providing a serene start to your hike. As you make your way up, you'll follow the Camino Incluso, a path that is well-marked and relatively easy to navigate. This section is characterized by its lush greenery and the occasional glimpse of Heidelberg below. The first 2 km (1.2 miles) will see you gaining about 150 meters (492 feet) in elevation, making it a good warm-up for the more challenging sections ahead.

### Heiligenberg and Historical Significance

At around the 3 km (1.9 miles) mark, you'll reach Heiligenberg, a site rich in history. This area was once home to a Celtic hill fort and later a Roman temple. The remnants of these ancient structures can still be seen today, offering a fascinating glimpse into the past. The Heiligenberg also features the ruins of the St. Michael's Monastery, which dates back to the 11th century. Take some time to explore these ruins and enjoy the panoramic views of the Neckar River and the city of Heidelberg.

### Keltenweg and Heidenknörzel

Continuing along the trail, you'll transition onto the Keltenweg, a path that further immerses you in the region's Celtic history. This section is slightly more challenging, with steeper inclines and rocky terrain. Around the 5 km (3.1 miles) mark, you'll encounter the Heidenknörzel, a large rock formation that is believed to have been a Celtic sacrificial site. The area is steeped in mystery and offers a unique atmosphere that is both eerie and captivating.

### Wildlife and Natural Beauty

As you make your way back towards the trailhead, the path will take you through a variety of landscapes, from dense forests to open meadows. Keep an eye out for local wildlife, including deer, foxes, and a variety of bird species. The flora is equally diverse, with everything from towering oaks to delicate wildflowers lining the trail.

### Navigation and Final Descent

The final 2 km (1.2 miles) of the trail involve a descent back towards Heidelberg. This section can be a bit slippery, especially after rain, so take care with your footing. Using a navigation tool like HiiKER can be particularly helpful in this section to ensure you stay on the correct path. The descent offers more stunning views of the surrounding landscape, making for a picturesque end to your hike.

This trail is a perfect blend of natural beauty and historical intrigue, offering hikers a well-rounded experience that is both physically rewarding and intellectually stimulating.