Paul Cooke’s men face Super League side Warrington Wolves in the last 16 of the Tetley’s Challenge Cup thanks to a 68-18 win over Hemel Stags.
The Dons will face Warrington on the weekend of April 25-27 for the fifth round tie.
To get there, they had to overcome a potential banana skin in Championship One outfit Hemel.
Despite a strong start with tries through Lee Waterman, Stewart Sanderson, Mick Butterfield and Richard Wilkinson, the Stags hit back through converted scores from Essad Al-Zubaidi, Alex Ingerfield and James Hill for 22-18.
Doncaster gave themselves a 10-point gap as Mike Emmett, who replaced the injured Scott Spaven, drove over before Grant Edwards scored as Doncaster took a 34-18 lead into the interval.
Chris Spurr, who retired at the end of last season, returned for Doncaster and was part of the side who engineered another try for the hosts - this time the impressive Wilkinson scoring.
Further unanswered tries from Ryan Wilson, Spurr, Sanderson, Liam Welham and Cooke capped off a 68-18 final score.
Doncaster: Butterfield, Morrison, Welham, Waterman, Sanderson, Cooke, Wilkinson, Carbutt, Spaven, Wilson, Leaf, Starling, Edwards. Subs: Robinson, Spiers, Emmett, Spurr.
Hemel: Cameron, Hill, Brown, Small, Al-Zubaidi, Barbera, Young, Maloney, Simmons, Howitt, Swindells, Ingerfield, Lijzouli. Subs: Hudson, Bailey, M’Baraga, Aldam.