Routes

Planner

Features

Updates

App

Login or Signup

Get the App

Login or Signup

Login or Signup

Routes
Hikes
United Kingdom
Wales
South Wales

Old St Mellons

The best walks and hikes around Old St Mellons

4.5

(502)

9,242

hikers

557

hikes

Hikes around Old St Mellons explore the area's mix of rural countryside and suburban green spaces on the eastern edge of Cardiff. The terrain is generally low-lying, characterized by walks along river valleys like the Rhymney and around local lakes. Many routes follow well-defined paths through parks and nature reserves, making the region accessible for various fitness levels.

Best hiking trails around Old St Mellons

  • The most popular hiking route is Riverside Park, Rumney loop from Rumney, a 4.8 mile (7.7 km) trail that takes about 1 hour 55 minutes to complete. This easy route follows paths along the Rhymney River.
  • Another top favourite among local hiking enthusiasts is Hendre Lake – Hendre Lake loop from Marshfield, an easy 2.8 mile (4.5 km) path. This is a mostly flat circular walk around the perimeter of Hendre Lake.
  • Local hiking enthusiasts also love the Boardwalk Through Reeds loop from Rumney, a 3.0 mile (4.8 km) trail leading through local parkland, often completed in about 1 hour 15 minutes.
  • Hiking around Old St Mellons is defined by lakeside paths, riverside trails, and walks through local nature reserves. The network of routes offers options suitable for different ability levels, with many easy, family-friendly paths available.
  • The routes in Old St Mellons are highly rated by the komoot community with an average score of 4.6 stars from over 490 reviews. More than 8,800 hikers have used komoot to explore Old St Mellons's varied terrain.

Last updated: May 12, 2026

12

hikers

#1.

Boardwalk Through Reeds loop from Rumney

4.77km

01:15

30m

30m

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Navigate with device

Send to Phone

Save

Easy

5.0

(6)

11

hikers

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Easy
guide_signup
Let us show you the way with the komoot mobile app
With a free komoot account, you can easily find, customize, and navigate endless outdoor adventures.

Sign up for free

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Easy

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

Easy

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
Sign up for free to see 553 more hikes around Old St Mellons.

Get access to more routes and recommendations from other explorers.

Sign up for free

Already have an account?

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

Start today with a free account

Your next adventure awaits.

Login or Signup

Popular around Old St Mellons

Road Cycling Routes around Old St Mellons

MTB Trails around Old St Mellons

Gravel biking around Old St Mellons

Cycling around Old St Mellons

Running Trails around Old St Mellons

Tips from the Community

Andy Lewis MTB 🇬🇧
October 18, 2025, Rhydypenau Park

Hardpack path through the park

0

0

Narrow bridge over a stream

0

0

Stunning little lake with a nice path going round it. Some nice views in particular from the Eastern point where a winding bridge gives the best sight across the whole lake

0

0

Mark Jacobs
April 5, 2025, Hendre Lake

Great place to walk. So much wildlife too see around the lake and beyond

0

0

Ruperra Castle or Rhiwperra Castle (Welsh: Castell Rhiw'r Perrai) is a Grade II* Listed building and Scheduled Ancient Monument, situated in Lower Machen in the county borough of Caerphilly, Wales. Built in 1626, the castle is in a ruinous condition as at 2023. Its grounds are listed on the Cadw/ICOMOS Register of Parks and Gardens of Special Historic Interest in Wales.

1

0

multiple well kept trails around the woodlands , but don't go cycling around the reservoir as I found out there is no cycling, even though there are no signs , i got abuse from aggressive walkers about it.

0

0

Whatever you do is don't cycle around the reservoir, got told off and abusively shouted at.

0

0

Open 24 hours

0

0

Frequently Asked Questions

Are there many circular walks in Old St Mellons?

Yes, many of the trails in the area are circular, making it easy to start and end your hike in the same place. A great example is the Hendre Lake – Hendre Lake loop from Marshfield, which is a gentle, mostly flat walk around the lake, perfect for a relaxed outing.

What are the trails like for hiking with dogs?

Old St Mellons is generally a good area for dog walking, with many parks and open spaces. Hendre Lake Park and Parc Tredelerch are popular spots with locals for walking dogs. However, some routes may pass through farmland with livestock or near roads, so it's always best to keep your dog on a lead where required.

Can I find easy, family-friendly hikes in the area?

Absolutely. The region is well-suited for families, offering many flat and accessible paths. The Boardwalk Through Reeds loop from Rumney is a great option, providing an easy walk through parkland that is manageable for little legs.

Are there any pubs or cafes on the walking routes?

Yes, you can plan a hike that includes a stop for refreshments. For a longer walk that incorporates a pub, consider the Y Maerun Pub & Dining loop from Marshfield. This moderate route allows you to enjoy the countryside before or after a well-earned break.

What is the terrain like on the hikes around Old St Mellons?

The terrain is generally low-lying and not overly strenuous. You'll mostly find well-defined paths along river valleys, like the Rhymney, and through local parks. While most routes are flat, some trails, such as the Rhymney River Circular Walk, feature short climbs through woodland sections.

What are some interesting natural spots to see while hiking?

The area is rich in natural beauty. Hendre Lake Park is a designated Site of Special Scientific Interest, known for its birdwatching opportunities and wildflowers. For a different experience, Cath Cobb Woods is an ancient woodland that offers a glimpse into a complex ecosystem with plants like bluebells and wood anemone, especially beautiful in the spring.

How many hiking trails are available around Old St Mellons?

There is a wide variety of options to explore, with over 500 hiking routes in the region. These range from short, easy strolls to more challenging moderate hikes, ensuring there's a trail for every ability level.

What do other hikers think of the trails in Old St Mellons?

The trails are highly regarded by the komoot community, with an average rating of 4.6 stars. Hikers often praise the peaceful riverside paths and the well-maintained trails through the area's green spaces and nature reserves.

Are there any historical points of interest along the trails?

Yes, the region has a rich history. The village core of Old St Mellons is a Conservation Area, reflecting its past as a coaching stop on a road used since Roman times. On some longer walks, you can also spot historic landmarks like Ruperra Castle in the distance.

Can I reach the trailheads using public transport?

Yes, many of the trails are accessible via public transport. Several bus routes from Cardiff city centre serve the Old St Mellons, Rumney, and Pontprennau areas, putting you within walking distance of trailheads for routes like the Hiking loop from Pontprennau.

Where can I park to go hiking in the area?

Parking is available at several of the main parks. Both Hendre Lake Park and Parc Tredelerch offer free parking, making them convenient starting points for many walks. For other routes, on-street parking may be available, but always check local restrictions.

What is the best time of year to hike in Old St Mellons?

You can enjoy hiking here year-round, but spring and summer are particularly lovely. In spring, woodlands like Cath Cobb Woods are filled with bluebells and other wildflowers. Summer offers long, pleasant days perfect for exploring the riverside paths and parks.

Most popular routes around Old St Mellons

Road Cycling Routes around Old St Mellons

Most popular attractions around Old St Mellons

Places to see

Store rating

Get inspired with the komoot mobile app

With a free komoot account, you can easily find, customize, and navigate endless outdoor adventures.

or

Join komoot Now

Store rating

Explore more

Browse the best Hikes in other regions.

PembrokeshireMonmouthshireGlyn TarellYstradfellteSwanseaCarmarthenshireRhondda Cynon TafCardiffMarloes And St. BridesTalybont-On-UskLlangennith, Llanmadoc And CheritonRhossiliNewportMumblesCeredigionLlanigonPenriceTenbyIlstonCraswallVale of GlamorganTawe-UchafLlanfrynachCrickhowellLlywelPennardTalgarthLongtownCaerphillyBridgendGwernyfedNeath Port TalbotLlangorsPenylanFelin-FachThe Vale Of GrwyneyMerthyr TydfilBreconLlanddewPort EynonMaescarCrayPontarddulaisLlanfihangel Cwmdu With Bwlch And CathedineTongwynlaisPentyrchHeathLlangattockGwaun-Cae-GurwenCathaysLlanishenLlangynidrBishopstonTorfaenNew InnLlanveynoeCrosskeysLlanwrtyd WellsGrovesend And WaungronMargamLlangyfelachPenllergaerPontlliw And TircoedBlaengwrachAbercarnHenllysSt. ThomasLisvaneMichaelchurch EscleyPenderryRoathSkettyCaerphillyRudryCymer And GlyncorrwgPentwynCyncoedSeven SistersRhiwbinaUpper CwmbranPontnewyddBon-Y-MaenGwynfi And CroeserwGlynneathCoedffrancFairwaterYstradgynlaisCastleBedwas Trethomas & MachenCrumlinRisca EastRisca WestBlaenau GwentWhitchurchUpper KillayCwmbrwlaTownhillLlanrhidian LowerLlandaff NorthBriton FerryNewbridgeMawrYscirPantegHonddu IsafGorseinonOnllwynPeterchurchPontprennauSt. MargaretsRadyr and MorganstownLandoreLlanrhidian HigherCroesyceiliogCwmavonCrynantVanBronllysLlanbradachMorristonBrynMargam MoorsWalterstoneAberavonUplandsAbersychanTrevethinDyffryn ClydachBirchgroveCilybebyllVowchurchTai-BachPort TalbotBlaenhonddanTrallongReynoldstonLlancilloNelsonNewtonDulasKentchurchPenmaenCwmllynfellPen TranchLlanyrafonAbbey DoreTurnastoneBargoedGowertonBlackwoodLlantarnamClyne And MelincourtWormbridgePontllanfraithMynyddbachKillayArgoedDunvantLlwchwrBaglanResolvenYstalyferaPenyrheol Trecenydd & EnerglynYnysdduBaglan MoorsNeathGelligaerLlansamletSandfields EastPontymoileCockettKenderchurchPonthirCwmbran CentralBaglan BayMaesycwmmerBlaenavonSandfields WestAber ValleyTonnaPengamCefn FforestEwyas HaroldPelennaBactonClydachPontardaweRowlstone

Nearby adventure guides

Things to Do around Pontprennau

background

Get ready to conquer new peaks

Sign up for Free

Explore
RoutesRoute plannerFeaturesHikesMTB TrailsRoad cycling routesBikepackingSitemap
Download the app
Follow Us on Socials

© komoot GmbH

Privacy Policy