Below is a list of runners who have reached 100 marathons in 2015 along with the event and date this milestone was reached.
| Chris Kay | 29-Dec-15 | Great Barrow |
| Barbara Johnston-Read | 08-Dec-15 | Prison To Prison (SA) |
| Clive Hearn | 05-Dec-15 | Waterloo 200th Anniversary |
| Stefan Klincewicz | 29-Nov-15 | Dymchurch Marathon |
| Alex Penny | 28-Nov-15 | Martello Marathon |
| Nick Cockburn | 28-Nov-15 | Broadmeadow |
| Di Roy | 15-Nov-15 | Awaiting final #100 spreadsheet update |
| Richard Whitaker | 14-Nov-15 | Autumn Shakespeare |
| Francis Brown | 08-Nov-15 | Athens Marathon |
| Matt Mitchell | 07-Nov-15 | Thames Meander |
| Ben Wittenburg | 31-Oct-15 | Pumpkin Marathon |
| David Mould | 24-Oct-15 | Snowdon |
| Paul Foster | 18-Oct-15 | Amsterdam |
| Harmander Singh | 18-Oct-15 | Toronto |
| Paul Bridges | 18-Oct-15 | Chelmsford |
| Judith Webb | 11-Oct-15 | Yorkshire Marathon |
| Robert Carr | 10-Oct-15 | Ranscombe Autumn Challenge |
| Stephen Wakeford | 10-Oct-15 | Ranscombe Autumn Challenge |
| Peter Grigoleit | 10-Oct-15 | 9Bar9x9 |
| Malcolm Brookes | 04-Oct-15 | Jersey |
| Gary Dixon | 04-Oct-15 | Chester |
| Mui Imm Tan (Jackie How) | 04-Oct-15 | Brussels |
| Subhashis "Bazz" Basu | 04-Oct-15 | Maplethorpe |
| William Mitchell | 27-Sep-15 | Robin Hood |
| Melanie Roberts | 27-Sep-15 | Robin Hood |
| Kate Coombes | 27-Sep-15 | High Weald Challenge 50k |
| Gary Brampton | 23-Sep-15 | Tolkien Run |
| Judith Chubb-Whittle | 19-Sep-15 | Uphill to Wells |
| Steve Greenhalgh | 15-Sep-15 | Centre of the Nation Series ND |
| Karen Summerville | 13-Sep-15 | Cotswold Way Ultra |
| David Parsons | 13-Sep-15 | Bacchus |
| Vicky Horne | 13-Sep-15 | Bacchus |
| Duncan Anderson | 06-Sep-15 | Awaiting final #100 spreadsheet update |
| Paul Mason | 30-Aug-15 | Enigma Shaken Not Stirred |
| Richard Kell | 30-Aug-15 | Enigma Shaken Not Stirred |
| Philip Smith | 23-Aug-15 | Dorset Doddle |
| Ellan Iaquaniello | 16-Aug-15 | Leila's Run |
| Steve Eaton | 16-Aug-15 | Leila's Run |
| Hazel Kurz | 25-Jul-15 | Lakeland 50 |
| Leo Lundy | 25-Jul-15 | Keith Whyte Waterfront Ultra |
| Luretta Spearing | 18-Jul-15 | Dorset Invader |
| Paul Spooner | 11-Jul-15 | Chiltern Challenge |
| Emmett Graham | 17-May-15 | Windemere |
| Colin Stark | 05-Jul-15 | From Here to there |
| Ian Culton | 30-Jun-15 | Great Barrow Challenge |
| Pat Clatworthy | 27-Jun-15 | Great Barrow Challenge |
| David Oxley | 21-Jun-15 | Seabank Marathon |
| Paul Sahota | 20-Jun-15 | South Downs Marathon |
| Andy Hoddle | 07-Jun-15 | Hare & Tortoise |
| Joe Hawkins | 06-Jun-15 | Awaiting final #100 spreadsheet update |
| Tom Enright | 01-Jun-15 | Cork City Marathon |
| Paul Bigmore | 27-May-15 | Dunkirk 75 Challenge |
| Russell Bestley | 23-May-15 | GUCR - 145m! |
| Piers Keenleyside | 17-May-15 | Richmond Park |
| David Palmer | 10-May-15 | Stroud |
| Emily Hannon | 25-Apr-15 | Fowlmead Challenge |
| Elaine Dean | 24-Apr-15 | Caucus Run |
| Ed Mills | 23-Apr-15 | St Georges Day Marathon |
| Richard Durance | 19-Apr-15 | Longhorn |
| Dave Freeborn | 12-Apr-15 | Brighton |
| Steve Jackson | 11-Apr-15 | CTS Exmoor |
| Beth Taylor-Jones | 29-Mar-15 | Port of Dover Running Festival |
| Jo Summers | 23-Mar-15 | Rome Marathon |
| Donna Richards | 21-Mar-15 | Enigma Week at the Knees |
| Peter Lemon | 15-Mar-15 | Larmer Tree |
| John Close | 14-Mar-15 | Ranscombe Spring Challenge |
| Michael Weaver | 14-Mar-15 | Thames Meander |
| Eugene Winters | 07-Mar-15 | Ballina |
| Mel Floyd | 08-Feb-15 | Enigma Quadzilla |
| Nigel Arthur | 15-Feb-15 | Portland Coastal |
| Jane Stedman | 14-Feb-15 | Valentine Marathon |
| Tony Bowe | 07-Feb-15 | Enigma Quadzilla |
| Maria Pali | 25-Jan-15 | Dark Star Marathon |
| Lorraine Barry | 25-Jan-15 | Viking Coastal Marathon |
| Greg Ward | 24-Jan-15 | Viking Coastal Marathon |
| Sunny Calitz-Patel | 10-Jan-15 | SVN Martello Marathon Day 1 |
| Sally Ford | 03-Jan-15 | Winter Enigma |