Below is a list of runners who have reached 100 marathons in 2013 along with the event and date this milestone was reached.
| Patrick Quinn | Awaiting final #100 spreadsheet update | |
| Jim Murray | 22-Dec-13 | Portsmoth Coastal TrM |
| Denzil Martin | 07-Dec-13 | Broadmeadow TrM |
| Lisa Hewitt | 09-Nov-13 | Enigma Fireworks TrM |
| Shirley Colquhoun | 09-Nov-13 | Goathland TrM |
| David Lunan | 03-Nov-13 | Rivington TrM |
| Ian Richardson | 27-Oct-13 | Newcastle Town Moor Marathon |
| Paolo De Luca | 26-Oct-13 | Beachy Head TrM |
| Kate Taylor | 13-Oct-13 | Munich Marathon |
| John Stew | 13-Oct-13 | Leicester Marathon |
| Karl Randall | 06-Oct-13 | Bournemouth Marathon |
| Jonny Kempster | 29-Sep-13 | Berlin Marathon |
| Jason Bulley | 28-Sep-13 | Cotswold Challenge |
| James Elson | 27-Sep-13 | Spartathlon (Greece) |
| Brian Ankers | 22-Sep-13 | Carlow / Kilkenny Marathon |
| Richard Wellburn | 15-Sep-13 | Farnham Pilgrims TrM |
| Peter Bowles | 24-Aug-13 | Thames Meander TrM |
| Ian J Berry | 11-Aug-13 | Salisbury 54321 50k |
| Kim Johnston | 11-Aug-13 | Salisbury 54321 TrM |
| Angus Searcy | 11-Aug-13 | Salisbury 54321 TrM |
| John Kirwan | 21-Jul-13 | Fairlands Valley Challenge |
| Steve Paull | 20-Jul-13 | Harrow Track Marathon |
| Michael Hodges | 14-Jul-13 | Wales Marathon (Tenby) |
| Jagjit Singh | 07-Jul-13 | Rio De Janeiro |
| Angie Sadler | 22-Jun-13 | Malvern Midsummer TrM |
| Keith Hiley | 08-Jun-13 | South Downs TrM |
| Jackie Barker | 01-Jun-13 | Round IOW |
| Alan Mann | 01-Jun-13 | Dartmoor Discovery 32m |
| Roger Hales | 01-Jun-13 | Dartmoor Discovery 32m |
| Rachel Smith | 01-Jun-13 | Kent RoadRunner Marathon |
| Michael Graz | 11-May-13 | Rhondda Rollercoaster ORM |
| Doug Mac Taggart | 14-Apr-13 | Brighton Marathon |
| Kaja Kosla | 14-Apr-13 | Brighton Marathon |
| Bryan Darney | 14-Apr-13 | Brighton Marathon |
| Ian K Taylor | 14-Apr-13 | Bungay Black Dog Marathon |
| Ellen Cottom | 29-Mar-13 | Broadmeadow TrM |
| Karen Hurrell | 29-Mar-13 | Enigma Good Friday TrM |
| Jim Meta | 16-Mar-13 | Gin Pit Trail Marathon |
| Gary Kelly | 05-Jan-13 | Enigma Winter TrM |