CRAWLEY Town manager Steve Evans admitted his side's play-off hopes are over as they fell to one of their biggest defeats of the season.
The champions elect were one of the few sides this season to dominate Crawley from start to finish and in fact the Red Devils were never in the game again after going behind in the fifth minute.
Yemi Odubade beat Town's defence for pace to put the visitors ahead from the opening attack of the game.
The former Oxford Utd striker then added another from a breakaway move, again leaving the home defenence in their tracks before slotting in from the right.
Crawley's best efforts came from star striker Charlie Ademeno, but despite going close a couple of times, Crawley never looked that convincing.
Ademeno forged no fewer than three chances in quick succession midway between the first two Stevenage goals.
He crossed for Glenn Wilson who headed wide, created another threatening move across goal which no-one could reach and then finally turned and twisted before putting a hot over the bar.
However the day was all about Stevenage edging closer to securing the title and following an almighty downpour of rain which turned into hail, Stevenage sealed victory.
Substitute Joel Byrom scored an incredible wondergoal for his side's third 20 minutes before the end. He saw Crawley keeper Simon Rayner off his line and took a shot from just two yards inside the Crawley half.
The ball flew over back-tracking Rayner's head and into his goal for what must be a candidate for goal of the season as Stevenage finished with a well-deserved three points and Crawley were left to rue the effective end of their season as a competitive force.
FULL-TIME: Crawley Town 0 Stevenage Borough 3
90mins+2 - Sam Rents crosses a long ball from the left which goes only a few yards from goal but no-one can latch onto it. Crawley have just been unable to create chances in the second half.
90mins - 4 mins added time.
85mins - The very heavy rain returns, but it will be too late to cause an abandonment!
80mins - SUB (Crawley) Eddie Hutchinson replaces Glenn Wilson.
78mins - The Stevenage fans are now dominating and are creating a good noise with their drumming.
75mins - SUB (Crawley) Mikey Malcolm replaces Charlie Ademeno.
70mins - GOAL (Stevenage) (0-3) Substitute Joel Byrom made sure of the three points for the leaders with a well-taken opportunist goal. Standing only two yards inside the Crawley half near the half-way line, he saw that keeper Simon Rayner was off his line and chipped the ball brilliantly over Rayner's head and into the net.
62mins - The sun has now come out and a brilliant rainbow has appeared at the stadium.
60mins - SUB (Stevenage) Chris Beardsley replaces Tim Sills.
55mins - Heavy Rain and hail have now stopped after it had threatened to stop the game if it had continued. There's now a lot of surface water on the touchlines.
54mins - SUBSTITUTION (Stevenage): Joel Byrom replaced Mitchell Cole.
It's like a monsoon at Broadfield Stadium with some unbelievably heavy rain pouring down. Play continues. Both sets of fans are in good cheer.
SUBSTITUTION: (Crawley) Lewis Killeen replaces Barry Cogan.
HALF-TIME: Crawley Town 0 Stevenage Borough 2
45mins - 4 mins added time.
37mins - Stevenage push forward for another chance, a cross from the right being met by the head of tall centre-half Jon Ashton, but he only glances it wide without power.
33mins - GOAL (Stevenage) 0-2 YEMI ODUBADE deals Crawley a further blow with his second goal of the game which came from a breakaway attack. He got on the end of a long ball, beat the defence for pace and completed a cool finish.
39mins - Ademeno has another attempt, twisting well and firing over the bar as Crawley enjoy a spell where they are getting on top.
26mins - Ademeno has a good run up the right wing, beating a defender and drills in a low and hard cross which none of his team-mates managed to connect to.
22mins - Crawley carve out their first chance when Charlie Ademeno crossed from the left and Glenn Wilson, waiting to pounce in the area, headed narrowly wide.
17mins - YELLOW CARD (Crawley) Glenn Wilson is booked for a late tackle.
11mins - Yemi proves a handful again and manages to get a curled shot on target from the outside of the area which is comfortably held by keeper Simon Rayner.
5mins - GOAL (Stevenage) 0-1 YEMI ODUBADE handed Crawley the worst of starts with a goal from the first attack of the game.
The Reds back-four failed to stop the pacey former Oxford Utd striker and he scored from the right hand channel with a shot slanted across to the left of the goal.
Steve Evans named an unchanged side for the big clash against top of the table Stevenage Borough.
Stevenage line-up with two former Crawley Town players in their squad, Michael Bostwick, who starts in central midfield, and goalkeeper Ashley Bayes, who is on the bench.
REDS: Rayner, Rusk, Rents, Langston, Broadhurst, Forrest, Ademeno, Pinault, Wilson, Cogan, Smith. SUBS: Hutchinson, Killeen, Malcolm, Quinn, Jordan
BORO: Day, Laird, Ashton, Odubade, Roberts, Sills, Bridges, Cole, Drury, Bostwick, Henry. SUBS: Bayes, Long, Griffin, Byrom, Beardsley
REF: Brendon Malone (Wiltshire)
ATT: 1,229 (352 away)
OBSERVER MAN OF THE MATCH: Ben Smith