Penalties await. Grimsby had the better chances during extra-time, but again neither side could find a way through.
Rovers made a last minute change of goalkeeper, taking off Will Puddy in place of ex-Grimsby stopper Steve Mildenhall for the shootout.
The atmosphere inside Wembley Stadium is tense as the players await their chance to join the Football League.
The Conference play-off final at Wembley Stadium between Grimsby Town and Bristol Rovers is headed to extra time as neither side could find a goal to break the 1-1 deadlock.
Both sides saw plenty of the ball, but neither managed to fashion anything too dangerous - Grimsby's best chances coming deep into the half with a threatening ball flashed across the box, but no one to meet it and a mazy run into the box, but without any end product.
Centre-half, Aristote Nsiala was the standout performer of the half, his pace keeping the Rovers' attack at bay when they tried to break through. Depsite an injury scare, the Congolese international made a fantastic last ditch tackle outside his own box near the end of the half.
The sides will now play a further 30 minutes in the hope of finding a winner.
Half-time at Wembley Stadium and it's all square between Grimsby Town and Bristol Rovers in the Conference Play-off Final.
A counter attacking goal put Grimsby ahead after just two minutes as Lennell John-Lewis scored to settle the Mariner's fans nerves. After that Rovers eventually came back into the game to make for an entertaining contest, with Grimsby Town having the pick of the chances.
Rovers' goalkeeper, Will Puddy was lucky not to be sent off for a deliberate hand-ball outside of the box, but referee, Ross Joyce, kept the game alive as a contest by letting him off with a warning.
Full blooded tackles and plenty of both passion from both teams, Rovers levelled the scoring at the half hour mark, taking advantage of poor defending from The Mariners in the box, Ellis Harrison hammering home from close range.
With the second half to come, only 45 minutes stand between Grimsby Town and the Football League if they're able to find a breakthrough.
No confusion over who this guy supports... maybe a little over his spelling though:
And could Robyn be the Mariner's youngest fan today at just nine weeks old?
Grimsby Town manager Paul Hurst says he believes his squad has match winners as they prepare to take on Bristol Rovers in their Conference playoff final tomorrow.
Grimsby Town's players will visit Wembley stadium this afternoon ahead of their Conference playoff final tomorrow.
The Mariners take on Bristol Rovers hoping to end their five year exile from the football league.
In the two meetings between the sides already this season, Rovers have had the edge, winning one and drawing the other.
Meanwhile the Highways Agency has lent its support to Mariners fans making the trip down to Wembley, saying that plans to close the A180 out of the town for roadworks have changed, and the road should be fully open on Sunday morning.
Highways England is giving a helping hand at the weekend to Grimsby Town fans heading to Wembley as their team bids to return to the Football League after an absence of 5 years.
Grimsby? Wembley? We're lifting w/b A180 closure at Brockleby early Sun morn to give Mariners' fans a smoother Wembley trip. Good luck!
Highways England is carrying out major improvements on the A180 – a key route out of the town – and had planned to close the westbound carriageway between the Brocklesby and Stallingborough Interchanges for much of the weekend.
However, following the Mariners’ success in the play-off semi-finals this weekend’s working arrangements have been reviewed and – depending on the weather - the road works should be lifted early on Sunday morning meaning fans heading to Wembley will get a clear drive out of Humberside along the A180 with no road works on their return on Sunday night either.
Fans are advised to check traffic conditions before setting out. Sections of the M1 on the route to London have Smart Motorway road works with narrow lanes and 50 mph speed limits in place past the road works.