4.7
(17)
175
riders
11
rides
Gravel biking around St. Harmon offers routes through a landscape characterized by the Cambrian Way, river valleys, and significant reservoirs. The region features varied terrain, including sections along the River Severn and within the Hafren Forest. Riders can expect a mix of forest paths, open country, and climbs around the Elan Valley dams and reservoirs.
Last updated: May 22, 2026
5.0
(2)
41
riders
77.2km
06:50
1,280m
1,280m
Hard gravel ride. Very good fitness required. Some segments of this route may be unpaved and difficult to ride.
30
riders
117km
08:06
2,140m
2,140m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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5.0
(3)
21
riders
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
3.8
(4)
21
riders
45.9km
03:09
740m
740m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4.9
(8)
50
riders
30.6km
01:46
310m
310m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Basic gift shop and toilets, along with a cafe.
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A good way into the valley. A flat out gravel surface that winds around the dams for miles
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0
a place where you can learn a bit of Elan Valley history
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0
one of my favorite places on my cycling route, camp site is very clean with access to all facilities, showers, laundry, charging points
0
0
While many routes in the St. Harmon area are rated difficult, there are a few moderate options. For a less strenuous ride, consider the Caban-Coch Dam and Reservoir – Elan Valley Reservoirs loop from Rhayader. This moderate 30.5-mile (49.1 km) route offers beautiful scenery without the extreme climbs of some other trails.
The duration varies significantly depending on the route's length and difficulty. For example, the challenging Trans Cambrian Way Loop, at 48.0 miles (77.2 km), typically takes around 6 hours and 49 minutes. Shorter, though still difficult, routes like the Start of Climb Up the Severn – Rhyd-y-Benwch, Hafren Forest loop from Llanidloes can be completed in about 3 hours and 29 minutes.
Many of the gravel routes in the St. Harmon area, particularly those exploring the Elan Valley and Hafren Forest, often have designated parking areas near their starting points. For routes originating near Llanidloes or Rhayader, you'll typically find public car parks available in these towns, which serve as convenient access points to the trails.
Given that most gravel routes around St. Harmon are rated as difficult, they might be challenging for younger children or less experienced family members. However, the more moderate sections, such as parts of the Elan Valley trails, could be suitable for families with older, more experienced riders. Always check the route details for elevation and terrain before setting out with family.
Spring and autumn generally offer the most pleasant conditions for gravel biking in St. Harmon, with milder temperatures and beautiful scenery. Summer can also be excellent, though some trails might be busier. Winter riding is possible but requires appropriate gear for potentially wet, muddy, and colder conditions, especially in higher elevations.
Yes, many of the popular gravel bike routes in the St. Harmon area are designed as loops. For instance, the extensive Craig Goch Dam – Caban-Coch Dam and Reservoir loop from Llanidloes offers a substantial circular ride around the Elan Valley reservoirs. Another option is the Elan Valley Climb to Rhayader – Claerwen Dam loop from Rhayader.
The gravel trails around St. Harmon offer access to several notable landmarks, particularly within the Elan Valley. You can ride past impressive structures like the Caban-Coch Dam and Reservoir and the Pen-y-Garreg Dam. Other points of interest include the historic Nantgwyllt Church and the Rhayader Town Clock.
The St. Harmon area is highly rated by the komoot community, with an average score of 4.7 stars. Reviewers often praise the challenging terrain, the stunning natural beauty of the Cambrian Way and Elan Valley, and the sense of adventure offered by the varied forest paths and open country.
While many routes venture into remote areas, the towns of Llanidloes and Rhayader, which serve as common starting points or pass-through locations for several trails, offer various cafes, pubs, and shops where you can refuel and refresh. It's always advisable to carry sufficient water and snacks, especially on longer routes.
There are over 10 dedicated gravel bike trails around St. Harmon listed on komoot, offering a range of experiences from moderate to difficult. This includes routes exploring the Elan Valley, Hafren Forest, and sections of the historic Cambrian Way.
Many of the gravel routes in St. Harmon, especially those venturing deeper into the Hafren Forest or the more remote parts of the Cambrian Way, offer a sense of solitude. While popular routes like the Trans Cambrian Way can see more traffic, the sheer number of trails and the vastness of the landscape mean you can often find quieter paths, particularly on weekdays or outside peak season.


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