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Road cycling routes
United Kingdom
Wales
South Wales

Old St Mellons

The best road cycling routes around Old St Mellons

4.2

(242)

13,007

riders

343

rides

Road cycling routes around Old St Mellons offer varied terrain, from moderate elevation gains to more challenging ascents. The area features a mix of urban and rural landscapes, with country roads and dedicated cycle lanes providing paved surfaces for cyclists. The region's Triassic landscapes contribute to the diverse environment, with views extending towards the Severn Estuary.

Best road cycling routes around Old St Mellons

  • The most popular road cycling route is Y Maerun Pub & Dining – Ty Coch Campsite…

Last updated: June 29, 2026

5.0

(1)

101

riders

#1.

Y Maerun Pub & Dining – Ty Coch Campsite loop from Pentwyn

35.6km

01:34

280m

280m

Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.

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Easy

Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.

Easy
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43

riders

Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.

Easy

Moderate road ride. Great for any fitness level. Some segments of this route may be unpaved and difficult to ride.

Moderate

Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

Moderate
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Tips from the Community

Peter Turner
November 30, 2025, Pont y Werin

This bridge gives great views of the marina, and forms part of the Cardiff Bay loop

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The Barrage connects Penarth to the Cardiff peninsula. It offers stunning views across the sea to one side, and the freshwater bay on the other. One of the highlights of the Cardiff Bay tour

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Great photo opportunity, but the area can be busy depending on the weather and it’s likely any progress on a bike would be very slow. Early mornings and evenings are good.

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Great place to meet up with family or friends before your planned adventure.

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Every day, this narrow crossing offers a new perspective on life. It's a unique place where you feel enveloped in blue. Love it!

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Geraint
February 28, 2025, Cardiff Bay Barrage

Cardiff Bay Barrage is a significant engineering project located in Cardiff, Wales. Completed in 1999, the barrage was built to create a freshwater lake in Cardiff Bay by damming the River Taff and the River Ely. This project transformed the bay area, which was previously a tidal estuary, into a more controlled water environment. Key Features and Purpose: Tidal Control: The barrage helps manage tidal flows, preventing flooding and allowing for the creation of a stable freshwater environment. Recreation and Tourism: The area around the barrage has been developed for recreational use, including walking and cycling paths, boating, and various leisure activities. It has become a popular destination for both locals and tourists. Environmental Impact: The construction of the barrage altered the local ecosystem. While it created new habitats in the freshwater lake, it also raised concerns about the impact on marine life in the estuary. Hydropower Generation: The barrage includes a small power station that harnesses tidal energy, contributing to renewable energy production. Economic Development: The project played a crucial role in the regeneration of Cardiff Bay, leading to significant investment and development in the area, including residential, commercial, and cultural projects. The Cardiff Bay Barrage is often noted for its engineering complexity and its role in transforming the landscape and economy of Cardiff.

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clear pathway around the water, popular routes for running, walking and cycling linked with the Cardiff bay trail (6miles)

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Good Coffee and Cake, but really loud (too loud) music. But always a welcome stop.

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Frequently Asked Questions

What kind of terrain can I expect on road cycling routes around Old St Mellons?

Road cycling routes in and around Old St Mellons offer varied terrain. You'll find mostly paved surfaces, including country roads and dedicated cycle lanes. Elevation gains range from moderate rides of up to 500 ft, suitable for all skill levels, to more challenging excursions with over 1500 ft of elevation, requiring good to very good fitness. The area features a mix of urban and rural landscapes, with views extending towards the Severn Estuary.

How many road cycling routes are available in the Old St Mellons area?

There are over 360 road cycling routes available around Old St Mellons. This includes a wide range of difficulties, with 115 easy routes, 190 moderate routes, and 55 challenging routes to choose from.

Are there any family-friendly road cycling routes near Old St Mellons?

Yes, Old St Mellons offers several easy, mostly flat routes suitable for families. For example, the West Side of Cardiff Bay – Cardiff Bay Barrage loop from Pentwyn is an easy 18.3-mile (29.4 km) path offering flat terrain and views of Cardiff Bay. Another option is the Roath Park Lake loop from Llanrumney, a 13.7-mile (22.0 km) easy trail through urban and parkland areas.

What are some notable landmarks or natural features I can see while cycling in this region?

The region boasts both natural beauty and historical significance. You can cycle past or near sites like Roath Park Lake and the Scott Memorial Lighthouse, or explore routes that offer views of Twmbarlwm Hill and its Iron Age hillfort in the distance. The Caerphilly Castle – Radyr Weir loop from Llanrumney also takes you past significant historical and natural points of interest.

What do other road cyclists say about the routes around Old St Mellons?

The road cycling routes around Old St Mellons are highly rated by the komoot community, with an average score of 4.2 stars from over 200 reviews. Cyclists often praise the varied terrain, the mix of urban and rural scenery, and the availability of both country roads and dedicated cycle lanes.

Are there any circular road cycling routes available?

Yes, many of the routes around Old St Mellons are designed as loops, offering circular journeys. Examples include the popular Y Maerun Pub & Dining – Ty Coch Campsite loop from Pentwyn, which is an easy 22.1-mile (35.5 km) ride, and the moderate Y Maerun Pub & Dining – Greenmoor Nurseries loop from Pentwyn.

What is the best time of year to go road cycling in Old St Mellons?

While specific seasonal advice isn't detailed, the region's varied landscape suggests pleasant cycling conditions during spring, summer, and early autumn. These seasons generally offer more favorable weather for exploring the country roads and cycle lanes. Always check local weather forecasts before heading out.

Are there routes suitable for beginners or those looking for an easy ride?

Absolutely. Old St Mellons offers 115 easy road cycling routes. These routes typically feature mostly paved surfaces and moderate elevation gains, making them ideal for beginners or those seeking a relaxed ride. The West Side of Cardiff Bay – Cardiff Bay Barrage loop from Pentwyn is a great example of an easy, flat option.

Can I find challenging road cycling routes with significant elevation around Old St Mellons?

Yes, for more experienced cyclists, there are 55 difficult routes available. The area around Old St Mellons can offer challenging excursions with over 1500 ft of elevation gain, particularly when venturing towards the surrounding hills like those near Twmbarlwm, which contribute to scenic but demanding routes.

Are there any cafes or pubs along the road cycling routes for a stop?

While specific cyclist-friendly cafes or pubs aren't detailed for every route, the presence of routes named after establishments like 'Y Maerun Pub & Dining' suggests opportunities for refreshment stops. Many routes traverse both urban and rural areas, increasing the likelihood of finding places to stop for a break.

What are the general characteristics of the landscape for road cycling in this area?

The landscape around Old St Mellons is characterized by a blend of urban and rural environments. You'll encounter 'really nice country roads' and dedicated cycle lanes, offering diverse scenery. The region is part of the Cardiff area, known for its Triassic landscapes, providing a varied backdrop for your rides.

Most popular routes around Old St Mellons

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