Please do not attend parkrun if you display any COVID-19 symptoms

The Course

The course is 5000m (5k) long. This has been accurately measured by us with a professional measuring wheel. The course is at Cosmeston Lakes Country Park, Penarth. The course is run on a mixture of tarmac paths, gravel paths and trail paths. Some sections of the course may accumulate mud, leaves and puddles after rain. Dependent on availability, marshals will be at key sections of the course, or signs will be in place.

Please remember that the parkrun uses shared paths. For the continued success of the event, please give way to other park users. This won't hurt your time, it won't stop you from getting a PB and it will make sure everyone continues to enjoy the event.

Please, wherever possible walk, jog, cycle or use public transport when attending the event. If you do have to drive, please consider car-sharing to reduce our impact on both the environment and other park users. Please also watch out for other park users when arriving and leaving. Parking may be limited so try to arrive early.

Course Safety

Cosmeston Lakes parkrun is a fun, free event organised by volunteers for the benefit of everyone. We wish to make the event as safe as possible, so participants, spectators and helpers are asked to take care about the following:

  • Please be considerate to the park and other park users at all times.
  • Children under the age of eleven must be accompanied (within arm's reach) throughout the run by a parent, guardian or appropriate adult of the parent's choice.
  • Please arrive by foot, by pedal-power or by public transport if you can - your efforts help to reduce our impact on the park and the planet.
  • Please consider volunteering to help occasionally - this event survives only because of your generosity - please visit the volunteer page for more information.
  • Take care near roads and car parks - some vehicles drive very quickly. Please congregate away from the cars and be careful in particular if you have children. If you’re driving to the run, please drive carefully even if you’re late!
  • When running, take care on uneven surfaces – whether on grass or on tarmac. Watch out for cyclists, other runners, pedestrians, children, dogs, wildlife, park animals, vehicles, park maintenance work, falling branches, bollards, posts and other obstacles around the course.
  • Please ensure that you are fit enough to walk, jog, run 5k (3.1 miles) with us.
  • Remember to warm up before the run.
  • If you see a runner with a serious problem, please stop to help them out and get help as soon as possible.
  • If you’re watching, keep clear of runners on the course, and look after any children and dogs you may have with you.
  • Lyme Disease is a bacterial infection spread to humans by infected ticks. Consider protecting yourself by wearing repellent when at parkrun events in grassy or wooded areas. See for further details.
  • Unfortunately dogs are not allowed at this event.
  • Runners pushing buggies are welcome, but please take care of others around you and do your best to start at an appropriate place in the field for your pace.

We hope these tips help to ensure that Cosmeston Lakes parkrun is fun and safe for everyone.

Age Grading

All parkrun events use Age Grading to help parkrunners compare results.

Age Grading takes your time and uses the world record time for your sex and age group to produce a score (a percentage). This score allows you to compare your personal performance against other people's performances even though they might be a different age and a different sex to you - the higher the score the better the performance. The scores can also be compared across different race distances - to allow you to, for example, compare a 5km time against a marathon.

For more information, please see our Support page.

Course Map

Course Description The course starts alongside the eastern lake, on a gently sloping gravel path up to ‘Mile Road’ (the main route through the park). Next is the ‘small loop’ - an undulating loop around the western lake. Third is the ‘big loop’, which again rounds the western lake then splits off and heads down into and through Cogan Wood, before climbing back up to Mile Road. Both loops are on a mixture of surfaces, including tarmac, gravel paths and trails. It’s back down Mile Road and the gravel path to the finish.
Unfortunately dogs are not allowed at this event.


Toilets are available at the visitor centre and the Refresh café, both adjacent to the car park.

Other park facilities include a visitor centre, adventure playground, barbecue and picnic areas, woodland walks, bird hides and a medieval village.

Getting There

Location of start

The event starts alongside the eastern lake.

Getting there by public transport

Bus: Cardiff bus service 94 (Cardiff to Barry via Penarth) and Easyway service 88 (Penarth to Barry) stop outside the park entrance. Services run every hour on Saturday mornings.

Train: The nearest train station is Penarth. It’s approximately 1.2 miles from the station to the park. Taxis are available outside the station. There are frequent train services from Penarth to Cardiff Central mainline station.

Getting there on foot

From Penarth town centre, follow Stanwell Road over the railway bridge, turning left just after the station onto Victoria Road. After 100m, turn left onto Westbourne Road and follow it for 1500m until its junction with Lavernock Road. Cross Lavernock Road after 800m (at the pedestrian crossing) and the park entrance is a further 100m along and to the right.

Getting there by road

For Satellite Navigation or Google Maps use the postcode CF64 5UY.
  • Cosmeston Lakes Country Park is located about five miles west of Cardiff and 11.5 miles from junction 33 of the M4 (via the A4232).
  • The main entrance is 1.5 miles south of Penarth town centre on the B4267 Lavernock Road between Penarth and Sully.
There is ample parking just after the entrance to the park. Parking charges apply after 10:00 a.m. on Saturday morning. Please see the Vale of Glamorgan Council website for further information.

Post Run Coffee

Every week we grab a post parkrun coffee in the Refresh lakeside café - please come and join us!