Ryan led all but the first of 50 laps in winning the IMCA Late Model tour feature and $2,400. The Deery checkers were his career second.
He left the top side just long enough to pass pole starter Dan Shelliam. Ryan found himself pursued by a host of challengers that at one point was running five wide close behind, but stayed in front to the checkers.
Point leader Tyler Bruening ended a couple car lengths off the pace in second to add a little more breathing room in his battle for the series championship with fifth-finishing Jeff Aikey. Luke Goedert was third and Scott Fitzpatrick ran fourth.
While Bruening ran second much of the night, he gave way near midway to last-starting Joel Callahan.
Callahan stayed close before breaking and bringing out one of the six yellows that punctuated the main event. Joe Zrostlik worked his way up from outside row 10 to finish sixth.
Ryan, whose father Terry won his first Late Model feature at Dubuque in 1991, got the best of Terry Neal in an epic feature there a couple years ago.
Winner of the $250 Sunoco Race Fuels feature qualifier drawing was Chad Holladay.
Mark Schulte was the Xtreme Motor Sports IMCA Modified winner at Dubuque.