Barrow came away from Brisbane Road with a point to show for their efforts against a Leyton Orient side with the third best home record in English football.
The Bluebirds came into the match fresh off the back of a comeback win on the road at Mansfield Town last weekend, and showed an air of confidence with putting O's goalkeeper Lawrence Vigouroux under pressure in the opening stages.
Ben Whitfield's third minute cross caused a brief moment of panic for the Orient defence, as Adam Thompson had to skim the ball over his own bar for a Barrow corner.
Another ball into the box just three minutes later, again delivered by Whitfield, slipped through Vigouroux's hands, and Josh Gordon might've pounced on the rebound if not for strong defending from the Orient back line.
Billy Waters thought he'd broken the deadlock after 17 minutes, when his acrobatic effort found the back of the net from close range. However, the linesman raised his flag right away to chalk off what would've been Waters' 9th goal of the season.
Paul Farman was called into action, and pulled off an excellent save, when Paul Smyth broke clear one-on-one from the resulting free kick.
The 24th minute saw Josh Gordon break down the right flank, dart into the box and unleash a powerful shot at Vigouroux, who took two attempts to secure the ball away from danger.
Paul Farman wasn't troubled too much in the first half, but dealt with the few chances that were thrown his way, including palming away a stinging shot from Orient's Smyth just after the half hour mark.
The Barrow fans clearly felt aggrieved just before the interval, when Tyrell Warren appeared to be fouled inside the area, but play was waved on despite adamant appeals. The right back was close to heading in a rebounded ball, when he appeared to be held and brought down in the box.
The Bluebirds started the second half lively, and Josh Gordon would've broken clear if not for a skillful last ditch tackle.
The 53rd minute saw Ben Whitfield drive forward and drill a powerful shot goalwards, which was blocked out for a Barrow corner.
Ten minutes later, Paul Farman rushed out of his goal and threw his body at Paul Smyth's effort, with the Bluebirds keeper needing medical attention following the stop.
Orient had their best chance in the game come the 83rd minute, when Harry Smith rose the highest, but his headed effort was too high to find the back of the net.
Barrow perhaps looked the most likely to win it in the late stages. Orient's Tom James was shown two yellow cards in as little minutes, as he had to bring down Josh Gordon to stop the forward breaking clear.
The Bluebirds couldn't quite get that final touch to find a winner, but a point on the road against the league leaders leaves Barrow right in the playoff mix.
Full Time: Leyton Orient 0-0 Barrow
Leyton Orient: Vigouroux, Rob Hunt, James, Thompson, Turns, El Mizouni (Clay 74'), Pratley (Brown 63'), Moncur (Duke-McKenna 64'), Smyth, Sotiriou, Kelman (Smith 75')
Subs Not Used: Nkrumah, Sweeney, Sargeant.
Barrow: Farman, Warren, Brough, Ray, Canavan, Neal, White, Gotts (Bennett 87'), Waters (Kay 79'), Gordon, Whitfield (Newby 72').
Subs Not Used: Moloney, Brown, Feely.