Loop of the Ergüel Castle Ruins

This loop is considered a difficult hike, suitable for experienced hikers with very good fitness levels. It involves a significant elevation gain of around 690 meters over its 16.2 km length. The ascent to Col des Pontins, for instance, climbs 340 meters over 4 kilometers with an average gradient of 8.5%.

The trail offers a varied and engaging terrain. You'll encounter a mix of surfaces, including approximately 5.57 km of asphalt, 4.43 km of gravel, 2.21 km of unpaved paths, 2.04 km of natural trails, and 1.65 km of paved sections. This diversity means you'll traverse everything from smooth, maintained sections to potentially rougher, natural ground, requiring sturdy footwear.

The primary highlight is the historic Ruins of Erguel Castle, the best-preserved castle ruins in the French-speaking Bernese Jura, offering panoramic views. You'll also pass the Col des Pontins Hotel, a good spot for refreshments, and the Longines Watch Factory near the start/end in St-Imier.

While the trail passes through natural areas, specific regulations for dogs within the Chasseral Nature Park or on this particular route are not detailed. It's generally advisable to keep dogs on a leash, especially in areas with livestock or wildlife, and to check local signage for any restrictions.

The Bernese Jura region is beautiful in spring, summer, and autumn. Spring offers lush greenery, summer provides warmer weather, and autumn brings vibrant foliage. Given the trail's difficulty and varied terrain, avoiding winter conditions with snow and ice is recommended unless you are specifically equipped for winter hiking.

No specific permits or entrance fees are required to hike this trail, as it is located within the Chasseral Nature Park, which is generally open to the public for recreational activities. However, always respect local regulations and private property.

The loop starts and ends in St-Imier. While specific parking locations aren't provided, St-Imier is well-connected by public transport, making it easy to reach the trailhead. Look for parking facilities near the town center or train station, which would likely be the most convenient starting point for the loop.

Yes, the route utilizes sections of several other trails. You'll find yourself on parts of the Erguël Bike trail, ViaBerna Etappe 3, Sentier des Pontins, and even small segments of the Trans Swiss Trail, offering a diverse hiking experience.

Hikers are treated to picturesque Swiss Jura landscapes. The trail winds through lush forests and offers extensive views of the Vallon de Saint-Imier. From the vantage point of the Ruins of Erguel Castle, there is a panoramic vista encompassing Sonvilier and Saint-Imier. You'll also see high Jura pastures, towering spruce trees, and potentially distant views of the prominent Chasseral mountain.

Yes, the trail leads over the Col des Pontins, where the Col des Pontins Hotel provides a convenient spot for refreshments or a meal, enhancing the overall hiking experience.

Due to its classification as a difficult hike with significant elevation gain and varied terrain, this specific loop is generally not recommended for beginners or young children. It requires a good level of fitness and hiking experience. There may be other, less challenging trails in the St-Imier region more suitable for families or those new to hiking.