Match ends, Altrincham 1, Grimsby Town 1.
Scott Leather scored a late equaliser for Altrincham to deny Grimsby three points in the race for promotion.
Lenell John-Lewis had a header ruled out for offside as the Mariners pressed for the opening goal.
Nathan Arnold forced home goalkeeper Stuart Coburn into a good save before breaking the deadlock with a stunning long-range strike.
The hosts earned a point with minutes remaining when Sean Williams' cross was converted by Leather from 12 yards.
Conference leaders Barnet's 3-1 win over AFC Telford means second-placed Grimsby are now eight points behind at the top of the table.
Grimsby manager Paul Hurst told BBC Radio Humberside:
"I don't think we played as well as we would have liked today but with such a late equaliser it kind of feels like a little bit like a defeat. The lads are down in the dressing room but 16 points out of 18 in the last six games; I think any team team would take that.
"We have to be humble and respect the point that we've got but again I would have liked us to have played better.
"We had a couple of opportunities and certainly with the goal we had an opportunity to clear the ball. We didn't clear it long enough and it came back at us with a good ball in."
- 7LawrieSubstituted forWilliamsat 63'minutes
- 4MoultSubstituted forCrowtherat 77'minutes
- 9GillespieSubstituted forReevesat 63'minutes
- 22NsialaBooked at 90mins
- 8DisleyBooked at 11minsSubstituted forClayat 60'minutes
- 29PellSubstituted forBrownat 59'minutes
- 11NeilsonSubstituted forMackrethat 87'minutes
- Steven Rushton
- Shots on Target
Second Half ends, Altrincham 1, Grimsby Town 1.
Aristote Nsiala (Grimsby Town) is shown the yellow card for a bad foul.
Foul by Aristote Nsiala (Grimsby Town).
Damian Reeves (Altrincham) wins a free kick.
Foul by Shaun Pearson (Grimsby Town).
Kyle Perry (Altrincham) wins a free kick.
Goal! Altrincham 1, Grimsby Town 1. Scott Leather (Altrincham) right footed shot from the centre of the box to the bottom right corner. Assisted by Sean Williams with a cross.
Substitution, Grimsby Town. Jack Mackreth replaces Scott Neilson.
Offside, Grimsby Town. Lenell John-Lewis tries a through ball, but Lenell John-Lewis is caught offside.
Attempt missed. Simon Richman (Altrincham) header from the centre of the box misses to the right. Assisted by Shaun Densmore.
Attempt missed. Shaun Densmore (Altrincham) right footed shot from more than 35 yards misses to the right from a direct free kick.
Foul by Scott Brown (Grimsby Town).
Sean Williams (Altrincham) wins a free kick.
Substitution, Altrincham. Ryan Crowther replaces Jake Moult.
Corner, Grimsby Town.