A number of roads will be closed on Sunday as hundreds of people take part in the Watford half marathon.

The popular event, which is organised by Active Training World, will start at 10am on February 4 in Cassiobury Park.

A lead car escort will then lead the runners on fully closed roads as they venture into the countryside lanes behind the Grove and its golf course as they head out on the 13-mile route.

Participants will pass through Bucks Hill, Commonwood Common and Chandlers Cross before the route loops back to the finish in Cassiobury Park.

More information about Sunday’s race, including entry details, is available at https://www.atwevents.co.uk/e/atw-watford-half-marathon-8841

Watford Observer: Taking a drink in last year's raceTaking a drink in last year's race (Image: Active Training World)

The full list of road closures can be read on the public notice portal which us used to access all of the upcoming and recent information about various restrictions and notices.

The portal advises the following lengths of roads will be closed between 10am and 1pm on Sunday when signs are in place:

- Parkside Drive, Watford from its junction with Cassiobury Drive north westwards to its junction with Langley Way.

- Cassiobury Drive, Watford from its junction with Parkside Drive north westwards and northwards for its entire length.

- The Cassiobury Drive/Langley Way roundabout, Watford from its southernmost junction with Cassiobury Drive clockwise for its entire length.

- Langley Way, Watford from its junction with Parkside Drive north eastwards to its junction with Bellmount Wood Avenue.

- Bellmount Wood Avenue, Watford from its junction with Langley Way north westwards, northwards and north eastwards to its junction with Cassiobury Drive.

Watford Observer: Two of the competitors in 2023Two of the competitors in 2023 (Image: Active Training World)

- Glen Way, Watford from its junction with Stanbury Avenue southwards for its entire length.

- Stanbury Avenue, Watford from its junction with Glen Way north westwards to its junction with Beechpark Way.

- Beechpark Way, Watford from its junction with Stanbury Avenue north westwards to its junction with Grove Mill Lane.

- Grove Mill Lane, Watford/Grove Mill from its junction with Beechpark Way south westwards, westwards and northwards to its junction with Fir Tree Hill.

- Langleybury Lane, Langleybury from its junction with Fir Tree Hill north eastwards and north westwards to its junction with Old House Lane.

- Fir Tree Hill, Chandlers Cross from its junction with Langleybury Lane south westwards, southwards and south westwards to its junction with Redhall Lane.

- Redhall Lane, Chandlers Cross from its junction with Fir Tree Hill westwards to its junction with Chandlers Lane.

- Chandlers Lane, Chandlers Cross from its junction with Redhall Lane north westwards to its junction with Toms Hill.

- Toms Hill, Chandlers Cross from its junction with Chandlers Lane north westwards to its junction with Bucks Hill.

- Deadmans Ash Lane, Sarratt from its junction with Bottom Lane south westwards for a distance of approximately 280m.

- Bottom Lane, Sarratt from its junction with Deadmans Ash Lane north westwards and westwards to its easternmost junction with Commonwood.

- Commonwood, Sarratt from its easternmost junction with Bottom Lane northwards to its junction with Quickmoor Lane.

- Quickmoor Lane, Sarratt from its junction with Commonwood eastwards to its junction with Bucks Hill.

- Bucks Hill, Sarratt from its junction with Quickmoor Lane southwards and south eastwards to its junction with Old House Lane.

- Old House Lane, Abbots Langley from its junction with Bucks Hill north eastwards and eastwards to its junction with Langleybury Lane.