Trecastle and Myddfai loop from Usk Reservoir

No, this loop is classified as a "difficult" touring bicycle ride and requires a "very good fitness level." It features substantial elevation gain, including steep road climbs with gradients up to 20%, and sections with rough, unpaved tracks where you might need to push your bike.

The terrain is varied. While much of the route features mostly paved surfaces, be prepared for unpaved and potentially difficult sections. A notable part includes an ancient Roman Road near Trecastle, which transitions onto a wide open grassy plateau with a rough track. Good bike handling skills are essential for these sections.

On average, it takes about 2 hours and 50 minutes to complete the 37.7-kilometer loop. However, this duration can vary significantly based on your fitness level, the weather conditions, and how often you stop to enjoy the views.

The loop offers diverse scenery and historical elements. You'll pass the Roman Road Near Trecastle, experience the Road to River Usk Crossing, and ride along the Usk Reservoir Track. Expect expansive views of moorland, forested areas, and the dramatic landscapes characteristic of Bannau Brycheiniog National Park.

The most convenient starting point with parking is typically at Usk Reservoir. Specific parking areas are usually well-marked around the reservoir, providing easy access to the cycling routes in the area.

Spring and summer generally offer the most favorable conditions with milder weather and longer daylight hours, making it ideal for enjoying the expansive views. However, be prepared for changeable weather in the Brecon Beacons at any time of year. Autumn can also be beautiful with vibrant foliage, but days are shorter.

While dogs are generally welcome in Bannau Brycheiniog National Park, specific rules may apply to certain trails or areas, especially those crossing private land or sensitive habitats. Always keep dogs under close control, preferably on a lead, to protect livestock and wildlife, and ensure you clean up after them.

No, there is no entrance fee to access Bannau Brycheiniog National Park, nor do you need a specific permit to cycle this route. However, please respect the countryside code, stay on marked paths, and be mindful of local regulations, especially regarding livestock and gates.

Yes, sections of this touring bicycle route overlap with other established trails. You will find yourself on parts of the Cycle across the Beacons, the Cambrian Way, and the historic Roman Road.

The Trecastle and Myddfai loop is known for its quiet, untrafficked nature, offering an immersive experience. This means facilities like cafes or pubs are not directly on the route itself. You would need to detour into nearby villages like Trecastle or Myddfai for refreshments, so plan accordingly and carry sufficient water and snacks.

Given the challenging nature and varied terrain, it's advisable to bring a well-maintained touring bicycle suitable for both paved and rough surfaces. Essential items include plenty of water, snacks, a repair kit (including spare inner tubes), appropriate clothing layers for changeable weather, a helmet, and a map or GPS device. Due to the remote sections, a first-aid kit is also recommended.