Glyncorrwg and Cymmer loop from Llwynypia

Despite being categorized as a touring bicycle route, this challenging 58.1-kilometer loop is best suited for an off-road capable bike, such as a mountain bike or a robust gravel bike. The varied terrain, including singletrack, rocky sections, and steep climbs, makes it unsuitable for traditional road or hybrid touring bikes.

This is described as a 'hard bike ride' requiring 'very good fitness'. With a substantial elevation gain of nearly 1,200 meters and potentially demanding technical sections, riders should be well-prepared for a strenuous day in the saddle.

The route features a highly diverse and often challenging mix of surfaces. You'll encounter approximately 31.3 km of path, 8.03 km of cycleway, and shorter sections of state road, street, and road. Crucially, there are also 737 meters of singletrack and descriptions of exposed open hill sections with variable technical features, including boardwalks, berms, large rocks, steps, drop-offs, cambers, and water crossings.

While the route starts from Llwynypia, specific parking details for that exact starting point are not provided. However, the route passes the Glyncorrwg Mountain Bike Centre, which is a common access point for trails in the Afan Valley and likely offers parking facilities.

Generally, there are no specific permits or entrance fees required to cycle the public trails within Afan Forest Park, including this loop. However, always check local signage or the official Afan Forest Park website for any updates or specific regulations, especially if accessing private land sections.

The route is rich in history and offers stunning views. You'll follow sections of the former South Wales Mineral Railway, engineered by Brunel, and can observe a derelict railway viaduct at Cymmer. Scenic highlights include a View of the Brecon Beacons from St Gwynno Forest, and you'll traverse forestry with rugged landscapes along the River Corrwg. Other notable points include the Awylyn Skyline Double Track and a Gravel Descent in the Afan Valley.

While specific rules for dogs on this exact loop are not detailed, many trails in the Afan Forest Park area allow dogs, typically requiring them to be kept on a leash to protect wildlife and ensure safety for all users. Given the challenging nature and potential for livestock or other cyclists, keeping dogs under strict control is advisable.

The best time to cycle this loop is generally during the drier months of late spring, summer, and early autumn. The trail's variable surfaces can become very muddy and challenging in wet conditions. Be prepared for potential extreme weather changes at altitudes up to 600 meters, regardless of the season.

Yes, the route incorporates sections of several official trails. You'll find yourself on parts of the National Cycle Network Route 47, Cychoedd-a-Dolenni Loops & Links, Skyline, Afan Valley Cycle Track, and the notable W² Trail, which includes some of the UK's most demanding descents.

The route passes by the Glyncorrwg Mountain Bike Centre, which typically offers facilities such as cafes, bike shops, and restrooms. Glyncorrwg Ponds, a popular angling facility, is also nearby. For more options, you would likely need to venture into the nearby villages of Glyncorrwg or Cymmer.

The estimated duration for this 58.1-kilometer loop is approximately 5 hours and 15 minutes of active cycling time. However, given its 'difficult' rating and significant elevation gain, allow extra time for breaks, enjoying the views, and navigating challenging sections.