Below is the route and approximate times of road closures for the Harrow Half Marathon.
The earliest and latest refers to the earliest and latest timings for competitors to pass that point.
The traffic closure times are not set yet but obviously will be earlier. Reopening will follow shortly after the latest times.
| ROUTE | EARLIEST | LATEST |
| START – HARROW SCHOOL PLAYING FIELDS | 09:00 | 09:00 |
| MILE 1 – STATION ROAD, HARROW | 09:05 | 09:14 |
| HARROW SHOPPING CENTRE | 09:06 | 09:16 |
| MILE 2 – HARROW RECREATION GROUND | 09:10 | 09:27 |
| MILE 3 – CUNNINGHAM PARK | 09:15 | 09:41 |
| HEADSTONE MANOR | 09:17 | 09:47 |
| MILE 4 – HEADSTONE MANOR near HEADSTONE LANE | 09:20 | 09:55 |
| NOWER HILL SCHOOL | 09:23 | 10:00 |
| MILE 5 – MARSH ROAD | 09:25 | 10:09 |
| PINNER HIGH STREET | 09:28 | 10:16 |
| MILE 6 – MARSH ROAD/PINNER LIBRARY | 09:30 | 10:22 |
| MILE 7 – GEORGE V AVENUE/NOWER HILL SCHOOL | 09:35 | 10:36 |
| MILE 8 – ST THOMAS’ DRIVE | 09:40 | 10:50 |
| TURN BEFORE UXBRIDGE ROAD | 09:41 | 10:53 |
| MILE 9 – GEORGE V AVENUE | 09:45 | 11:04 |
| MILE 10 – HEADSTONE MANOR | 09:50 | 11:17 |
| MILE 11 – HARROW RECREATION GROUND | 09:55 | 11:31 |
| MILE 12 – ROXBOROUGH ROAD | 10:00 | 11:45 |
| HARROW SHOPPING CENTRE | 10:02 | 11:48 |
| MILE 13 – BOTTOM OF GARLANDS LANE | 10:05 | 11:59 |
| FINISH – HARROW SCHOOL PLAYING FIELDS | 10:06 | 12:00 |