All parkrun events in this country are currently suspended due to COVID-19 (Coronavirus). For further details please see here

The Course

The course is 5000m (5K) long. This has been accurately measured by us with a professional measuring wheel. The course is in Cassiobury Park, Watford. The course is run entirely on tarmac 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

The Cassiobury parkrun is a fun, free event organised by volunteers for the benefit of everyone. We wish to make the run as safe as possible, so runners, 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. Health advice about running can be found at the excellent Runners' Medical Resource website (although this external website focuses on preparation for a race and does not describe parkrun events).
  • 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.
  • It is not permitted to run with a pushchair and a dog at the same time.
  • 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.
  • You are welcome to take part with a dog, but please keep the dog on a short lead or short harness and under control throughout the event. Please also review the parkrun support page article about running with a dog at parkrun events.
  • Runners pushing buggies are welcome, but please take extreme care of other runners around you. If possible start from the back of the field and try to keep to one side of the main body of runners.

We hope these tips help to ensure that Cassiobury 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

A flat, anti-clockwise 2.5 lap course run entirely on tarmac paths.
Runners and volunteers should assemble at the finish line next to The Cha Café at the Shepherds Road entrance, before walking around 400 metres to the start line by the Rickmansworth Road (A412) entrance. The first 800 metres is a straight stretch down ‘central avenue’, with a sharp left turn at the bottom that will take runners past the tennis court and the café and back to the start. This lap is completed a second time, and then on the third lap the finish is by the café.


There is a children’s play area next to The Cha Café.
The Café does have toilets, but we cannot guarantee that it will be open before the run starts each week.

Getting There

Location of start

Runners and volunteers should assemble at the finish line next to The Cha Café at the Shepherds Road entrance, before walking around 400 metres to the start line by the Rickmansworth Road (A412) entrance.

Getting there by public transport

Underground: Watford Underground Station is served by the Metropolitan Line. On Saturday mornings trains for Watford leave from Baker Street station (not Aldgate) every 15 minutes. To get from the station to the park cafe, turn right onto Cassiobury Park Avenue and then turn left onto Shepherds Road. The walk is 400 metres.

Overgound/National Rail: Watford Junction Station is a two-kilometre walk from The Cha Café in Cassiobury Park. The station is served by both London Overground trains and National Rail Services running between London Euston and Milton Keynes. To walk to the park, turn right out of the station onto Station Road, then turn left onto Rickmansworth Road (A412) and cross to the north side of the road. When you reach the park take the left path, segregated for pedestrian/cyclists, that leads to The Cha Café.

Bus: The Cassiobury Park Avenue bus stop is served by the following bus services on a Saturday: 336 from High Wycombe to Watford via Beaconsfield, Amersham and Rickmansworth. Please see the Carousel website for the timetable before travelling as it is subject to change.
352 from Hemel Hempstead to Watford. Please see the Carousel website for the timetable before travelling as it is subject to change.

Getting there on foot

The park can be accessed from Cassiobury Park Avenue, Rickmansworth Road, Shepherds Road, Parkside Drive and Gade Avenue. The Cha Café is no more than 500 metres from any of these entrances.
Cassiobury Park is situated next to the Grand Union Canal and so can easily be reached traffic free by bike or on foot along the Canal Towpath. There are bike racks available at The Cha Café.

Getting there by road

Parking is extremely limited around Cassiobury Park and we would strongly suggest travelling by foot, bike or public transport. A pay and display car park is available at Watford Underground Station on Metropolitan Station Approach, just off Cassiobury Park Avenue, 400 metres from The Cha Cafe. The post code is WD18 7LE. The current charge for parking on a Saturday is £2. To get to the park, walk back up Metropolitan Station Approach, turn right onto Cassiobury Park Avenue and then turn left onto Shepherds Road which leads to The Cha Café.

Post Run Coffee

Every week we grab a post parkrun coffee in The Cha Café - please come and join us!