A middle-aged housewife and mother, after spending a lifetime giving to others, decides to claim a piece for herself and enters the grueling 26-mile Boston Marathon as an obsessive means of self-expression.
| Actor | Role |
|---|---|
 Joanne WoodwardBetty Quinn | Betty Quinn |
 John ConsidineLarry Quinn | Larry Quinn |
| MMelissa NewmanJaney Quinn | Janey Quinn |
 Mary-Beth ManningKathy Quinn | Kathy Quinn |
 Barnard HughesJohn Matusak | John Matusak |
 Barbara MeekEvelyn Parnell | Evelyn Parnell |
 James HoughtonHandsome Man | Handsome Man |
| LLinda PetersonHolly | Holly |
| CChris AnastasioMr. Grillo | Mr. Grillo |
| RReed HarveyEarl | Earl |
 Tom KempNorman | Norman |
| NNancy TatesLois | Lois |
 Annette MillerWoman with Dog | Woman with Dog |
| FFrank DolanAnnoyed Man | Annoyed Man |
| BBurt JohnsonPunk | Punk |
 Mickey JonesPunk | Punk |
| SStephan DriscollPunk | Punk |
 Michael CurrieCop Friend | Cop Friend |
| WWendy SakakeenyHostess | Hostess |
| JJohn BloodStarter | Starter |
| NNorman MerrillYoung Runner | Young Runner |
| JJoan TolentinoWoman with Ice | Woman with Ice |
| BBill CastellinoBoy with Corvette | Boy with Corvette |
| DDavid WilsonBoy with Corvette | Boy with Corvette |
 Ken BakerMan with Bandage | Man with Bandage |
| RRobert J. ColonnaOlder Cop | Older Cop |
| NNancy James(uncredited) | (uncredited) |
| MMike Young(uncredited) | (uncredited) |