4.4
(84)
1,741
riders
79
rides
Mountain biking around Old St Mellons offers diverse terrain for riders, characterized by riverside paths, woodlands, and varied elevation. The region features routes with views of historical landmarks like Castell Coch and Caerphilly Castle. Terrain mountain biking Old St Mellons includes gentle gradients suitable for easy rides, as well as more challenging ascents through areas like Mynydd Rudry. These natural features provide a range of experiences for mountain bikers.
Last updated: May 25, 2026
5.0
(2)
48
riders
24.7km
01:28
200m
200m
Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.
4.5
(4)
18
riders
21.3km
02:15
640m
640m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

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5.0
(1)
16
riders
16.2km
01:23
340m
340m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
5.0
(1)
8
riders
26.2km
02:00
520m
520m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
4.3
(3)
13
riders
47.7km
03:05
580m
580m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Always a nice ride across this section. Great views, but can be mucky in the winter.
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Great place to capture some photos of the River Taff. Scenic all year round
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This father and son wrote the Welsh National Anthem in 1856. Evan wrote the lyrics and James composed the Melody.
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The other side of the road from the main Ganol trails.
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The white noise from the crashing water makes this a perfect place to tune out of the world. Unique place!
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Watch out for the end bit - take the left hand route if you want to avoid the chute
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Built in 1280, this castle has a fascinating life story. It is the second largest castle and grounds in UK, slightly smaller than Windsor castle. The water defenses are now home to plenty of birds and the grounds offer fantastic views of this stunning castle
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The diversion, as shown in the photos, around the new Taff's Well railway depot has now been removed.
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There are over 80 mountain bike trails around Old St Mellons listed on komoot, offering a wide variety of options for different skill levels and preferences.
The trails around Old St Mellons cater to all skill levels. You'll find 14 easy routes, 59 moderate routes, and 11 more difficult trails, ensuring there's something for everyone from beginners to experienced riders.
Yes, there are several easy routes suitable for families. These often feature gentler gradients and scenic paths, such as the Blackweir Footbridge – View of Castell Coch loop from Cathays, which is 15.1 miles long and offers views of Castell Coch.
Trail distances vary significantly. You can find shorter routes like the 10-mile (16.1 km) Mynydd Rudry – Garlic Run Trail loop from Machen, up to longer rides such as the 31.8-mile (51.2 km) Blue Bridge, Radyr – View of Castell Coch loop from Rumney.
The region offers diverse terrain, including riverside paths, dense woodlands, and routes with varied elevation. You'll encounter both gentle gradients and more challenging ascents, particularly in areas like Mynydd Rudry.
Many of the trails around Old St Mellons are designed as loops, allowing you to start and finish at the same point. Examples include the Old Quarry – Woodland Trail loop from Machen and the Caerphilly Castle – Garlic Run Trail loop from Machen.
The trails often provide views of historical landmarks. You can spot Castell Coch and Caerphilly Castle along various routes. Some trails, like the Caerphilly Castle – Garlic Run Trail loop from Machen, even take you close to these impressive structures.
The area is highly rated by the komoot community, with an average score of 4.4 stars from over 80 reviews. Riders often praise the diverse landscape, the mix of riverside paths and woodlands, and the scenic views of historical castles.
Spring and autumn generally offer the most pleasant conditions for mountain biking, with milder temperatures and beautiful scenery. Summer can be great too, but be prepared for potentially warmer weather. Winter riding is possible, but trails may be muddier and require appropriate gear.
While riding, you might encounter areas near Cardiff Bay or the Roath Park Lake. The region's natural beauty includes woodlands and varied landscapes that are enjoyable throughout the year.
Yes, there are 11 difficult routes for experienced mountain bikers seeking a challenge. These trails typically feature more significant elevation changes and technical sections, such as those found in the Mynydd Rudry area.
The woodlands and riverside paths around Old St Mellons are home to various local wildlife. Keep an eye out for common birds, small mammals, and diverse plant life, especially in quieter sections of the trails.


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