| Harrow Rec Users Association | Community gardening - first Monday and fourth Friday of the month | https://bit.ly/4aGryBU |
| Harrow Park Run (Harrow Recreation Ground) | First Timers Welcome, Event Day Course Check, Timekeeper, Barcode Scanner(s), Tail Walker(s) | https://bit.ly/4bBNGOZ |
| Kenton Junior Park Run | First Timers Welcome, Event Day Course Check, Timekeeper, Barcode Scanner(s), Tail Walker(s) | https://bit.ly/4c2TFwh |
| Pinner Village Gardens Junior Park Run | First Timers Welcome, Event Day Course Check, Timekeeper, Barcode Scanner(s), Tail Walker(s) | https://bit.ly/3V5oYiY |
| Canons Park Run | First Timers Welcome, Event Day Course Check, Timekeeper, Barcode Scanner(s), Tail Walker(s) | https://bit.ly/4544v2I |
| Harrow Litter Pickers | Litter Picking | https://bit.ly/3VbhZW2 |
| Old Reading Nature Reserve (Harrow Nature Conservation Forum) | Monday work parties | https://bit.ly/4aHESGd |
| Newton Farm (Harrow Nature Conservation Forum) | Saturday work parties | https://bit.ly/4aHESGd |
| Bentley Priory (Harrow Nature Conservation Forum) | Saturday work parties | https://bit.ly/4aHESGd |
| Stanmore Common (Harrow Nature Conservation Forum) | Sunday & Wednesday work parties | https://bit.ly/4aHESGd |
| Stanmore Country Park (Harrow Nature Conservation Forum) | Wednesday work parties | https://bit.ly/4aHESGd |
