Cycling & running events in Watford, 2026

Watford Training Notes

Running: Cassiobury Park is the local running hub, and the ATW Watford Half Marathon & 10K starts from Cassiobury Park Avenue on 07/02/2027. Watford Joggers gives you the reliable rhythm, with Wednesday Social Club Run at 6:45pm, Sunday Social Run at 9:20am in the Gade Avenue car park, and Tuesday intervals from 7pm to 8pm. Watford Harriers Athletics Club keeps the sharp end honest at Woodside Stadium. The Watford 10k route brings trails and hills in Cassiobury Park, and the Watford Half route says early that this wasn’t going to be an easy one.

Cycling: Watford riding starts easy through the town centre, then rolls out through National Cycle Routes 6 and 61, Ebury Way, Abbey Way, and the Green Loop. The Green Loop runs 5 miles around the town centre and links Watford Junction to Cassiobury Park. The North Watford to Aldenham lake loop gives you 12 miles in about 2 hours at a steady pace, takes you on quiet lanes through Wall Hall and Aldenham Village, and uses Bridleway 54 through some woodland. Watford Velo Sport brings road racing, CX, time trialling, hill climbing, and MTB, with Sunday rides meeting at 08:15 for an 08:30 roll-out.

Season: April, May, June, July, August, and September are the best months, and summer makes Cassiobury Park, Ebury Way, and the Green Loop feel like proper base miles territory. The 5km water station means locals keep the legs ready for uneven ground. Winter turns the Watford Half into the anchor test, with a 10:30am start and three water stations on a hilly route. Watford Joggers makes the dark January night easier, and Watford Velo Sport keeps the Sunday Z2 rolling through different groups and paces.