Dobmeier took the early lead as the green flag flew, bringing Jack Croaker and his Hugo's Family Marketplace eight-ball with him into second.
After working on the third place running Egeland for a handful of laps, point leader Jade Hastings moved the Ault Construction No. 8H into third place.
It only took five laps for the leaders to start working lapped traffic as Croaker fought to remain within striking distance to the leading Dobmeier.
The leaders were perfectly spaced through the midway point as the race remained caution free. Croaker slid over the top of the banking on the front stretch, briefly breaking his momentum in his pursuit of Dobmeier.
With five laps remaining, Croaker and Hastings caught the leader with Croaker taking the lead at the beginning of the 22nd lap. The pass was erased, however, by a returning Wade Nygaard as the ten-time champ slowed to a stop in turn four in the Auto Finance Super Center No. 9N.
With clear track ahead of him, Dobmeier led the final four trips around the three-eighths mile oval to score his 181st NOSA victory over Hastings and Croaker. The Omdahl cousins, Nick and his CMS No. 0, and Zach in his MinnKota Power Co-Op No. 17 rounded out the top five.
Weston Olson and Josh Swangler in his Infinite Skin No. 10S led the feature to green on night two with Olson taking the point in the Olson Underground No. 27. Nygaard and Hastings followed the rookie Olson into second and third respectively.
Olson, who has spent his first season in 410 Sprint Cars under the tutelage of the veteran Nygaard, continued to lead the race through the first nine laps, working lapped traffic in the latter half of the first green flag stint.
A caution for Tom Egeland on lap ten gave Nygaard, Hastings, Dobmeier and Mullen a breather in their quest for the top spot.
Dobmeier charged from fourth to the lead on the ensuing restart, while Olson, Nygaard, Hastings, and Mullen remained second through fifth.
Mullen and Hastings traded 'haymakers,' a series of sliders in the first six laps following the resumption of the race. While they traded third and fourth, Nygaard passed his protege for second, while Hastings and Mullen followed him past the early leading Olson.
A caution for Ryder Olson with five laps to go set up one final restart, while Weston Olson's great run came to an end during this time as well.
Hastings, who had made his way into second just before the final caution, stalked Dobmeier in for the first laps of the final restart, but Dobmeier pulled away in the waning laps to sweep the weekend over Hastings, Mullen, Nygaard, and Croaker.
Series action continues this weekend with a return trip to Glyndon, MN's Buffalo River Speedway on Sunday night, with racing beginning at six.