On a notoriously unhappy hunting ground, the Pilgrims battled their way to a share of the spoils against the struggling Quakers, although they did create the best chances.
Jimmy Knowles hit the crossbar in the first half, before seeing a second half 'goal' ruled out for offside.
Tom Edge was pressed into service at centre-half, with Michael Bostwick ruled out for the first time this season.
Chances were at a premium throughout - with United seeing their best chance go begging in the 31st minute. Finley Thorndike teed Jimmy Knowles up from the left - but United's number 11 fired his effort against the crossbar from around six yards out.
Darlington's best chance fell to Jake Lawlor four minutes before half-time - sending his header narrowly wide from a Will Hatfield free-kick delivery.
United thought they had broken the deadlock midway through the second half, but Jimmy Knowles was penalised for offside after turning home from close-range once Brad Nicholson had been denied.
There was a late save from Cameron Gregory to deny substitute Jacob Hazel, while Edge and Thorndike were both cautioned in stoppage time for time-wasting, but honours very much ended even.
Darlington (4-3-3): Tommy Taylor; Kallum Griffiths, Toby Lees, Jake Lawlor, Jassem Sukar; Tom Platt, Will Hatfield, Adriano Moke (Ben Liddle 75); Kaine Felix (Jacob Hazel 81), Andrew Nelson (Cameron Salkeld 84), Finlay Barnes. Subs (not used): Jarrett Rivers, Jordan Windass.
Boston (4-1-2-1-2): Cameron Gregory; Tyler Knowles, Tom Edge, Zak Mills, Brad Nicholson; Jordan Richards; Sam McLintock (Michael Gyasi 77), Finley Thorndike; Keaton Ward; Kelsey Mooney (Martin Woods 60), Jimmy Knowles. Subs (not used): Dylan Hill, Sam Essien, Jake Lovelace (gk).
Referee: Zac Kennard-Kettle.
Attendance: 1,128.
PIC: Andy Futers.