Match ends, Chester FC 2, Grimsby Town 2.
Grimsby's Conference title hopes were dealt a blow as Chester hit back late on to deny them a fifth straight win.
Ollie Palmer finished well from Jon-Paul Pittman's cross on 21 minutes.
And, when Nathan Arnold's effort hit the post, Pittman netted the rebound for a 2-0 lead on 67 minutes.
But Ben Heneghan smashed in a reply on 75 minutes before John Rooney's penalty, after Gregor Robertson had fouled Matty Hughes, levelled it up for Steve Burr's men six minutes from time.
Grimsby stay fourth, five points behind leaders Barnet, while Chester move back up into 10th spot, their highest league ranking since the club reformed in 2010.
Grimsby Town manager Paul Hurst told BBC Radio Humberside:
"Obviously, for me, the disappointing thing for me is to have been two-nil up and, with the defensive record that we've got, that we couldn't see the game out.
"For the neutral, it must have been a good game to watch. Both sides showed attacking intent and give credit to Chester. They kept going and never gave up.
"It's as though we just settled for what we had and tried to protect but we still ended up creating two good chances to win the game."
- 18AbbottSubstituted forHobsonat 90+1'minutes
- 15RichardsSubstituted forRooneyat 68'minutes
- 2ThomsonSubstituted forMahonat 34'minutes
- 35RobertsonBooked at 83mins
- 20ArnoldSubstituted forJolleyat 85'minutes
- 33PalmerSubstituted forParslowat 72'minutes
- Martin Coy
- Shots on Target
Second Half ends, Chester FC 2, Grimsby Town 2.
Attempt blocked. John Rooney (Chester FC) left footed shot from the left side of the box is blocked.
Substitution, Chester FC. Craig Hobson replaces Brad Abbott.
Foul by Danny Parslow (Grimsby Town).
Matty Hughes (Chester FC) wins a free kick.
Attempt saved. Christian Jolley (Grimsby Town) right footed shot from a difficult angle on the left is saved.
Substitution, Grimsby Town. Christian Jolley replaces Nathan Arnold.
Attempt missed. Ibou Touray (Chester FC) left footed shot from outside the box misses to the right.
Goal! Chester FC 2, Grimsby Town 2. John Rooney (Chester FC) converts the penalty with a right footed shot to the bottom right corner.
Gregor Robertson (Grimsby Town) is shown the yellow card for a bad foul.
Penalty conceded by Gregor Robertson (Grimsby Town) after a foul in the penalty area.
Penalty Chester FC. Matty Hughes draws a foul in the penalty area.
Foul by Gregor Robertson (Grimsby Town).
Oliver McBurnie (Chester FC) wins a free kick.
Foul by Nathan Arnold (Grimsby Town).
Ryan Higgins (Chester FC) wins a free kick.
Goal! Chester FC 1, Grimsby Town 2. Ben Heneghan (Chester FC) right footed shot from a difficult angle on the left to the bottom right corner. Assisted by Ryan Higgins with a cross.
Foul by Michael Kay (Chester FC).
Jack Mackreth (Grimsby Town) wins a free kick.