Kemal Husen of Ethiopia stormed to victory in the Irish Life Dublin Marathon in a new course record, while compatriot Sorome Negash landed the women's event.
Despite the damp conditions, Husen clocked two hours six minutes 52 seconds in just his second marathon, with the 20-year-old lowering the mark of 2:08:06 set by Morocco's Othmane El Goumri in 2019.
Geofrey Kusuro of Uganda filled the runner-up berth in 2:10:45, with Clonliffe Harriers' Stephen Scullion claiming the national title in third in 2:11:51. Scullion's time was the fourth fastest of his career.
Defending champion Taoufik Allam of Morocco pulled up in the early stages of the race in the Phoenix Park with an apparent hamstring injury.
Negash recorded a personal best time of 2:26:22 in the women's race.
The 25-year-old was followed home by Kenya's Joan Kipyatich in 2:27:04, with Genet Habela Abdurkadir of Ethiopia third in 2:27:49.
A maiden national title went the way of 43-year-old veteran Ann Marie McGlynn of Letterkenny AC, who finished fifth in 2:34:13.
Patrick Monahan secured a remarkable seventh success in the wheelchair race, posting a winning time of 1:41:04 as the Kildare man enjoyed the perfect prep ahead of of next Sunday's New York Marathon.
For national champion Scullion, it was his second podium in the overall race, having finished runner-up in 2019. The Belfast athlete was ecstatic after the race
"That's a really good day's work," Scullion told RTÉ Sport. "I'm really happy that with 200 metres to go, I tried to outsprint that guy. Because someone had already told me I got third. So, I was thinking podium was done.
"But then I was thinking wouldn't it be brilliant if I got second, like in 2019? And I sprinted as hard as I could, But thankfully I got the podium.
"I thought I could podium. It's not a cockiness or an arrogance, it's just when you've put in the work and you've trained hard, there's just a surety that you know as it gets tough, you know you're going to be OK.
"Not the best conditions for most people but I really struggle in the heat. I'm a bigger guy, so weight and heat doesn't go well. I thought the colder it would be, the more it would suit me. All my best marathons have been on really cold days.
"The only thing it does bring, it's tougher to pick up the bottles. And as you're trying to take the drinks, you're diaphragm is spasming a bit because of the cold. But I'll take that all day over Tokyo or Doha.
"For Dublin, what do you expect?"
For McGlynn, it was her first national victory, having been beaten by Courtney McGuire last year.
"In 2019, I thought I had it," she said. "Last year, I thought there was a chance. The amount of support I have, I went past Clonskeagh, I went past UCD and I pumped my fist up to Noel Carroll, because he was my coach for a couple of months.
"I have his name here. I was praying to them all - bring me home."
After continuing his dominance in the wheelchair race, Monahan reflected on the tricky conditions and looked ahead to next week.
"With the chair, it can be a little bit treacherous in the wet so I had to nurse the chair around the bends," he admitted. "I was happy with my push. First half is always a bit tougher, once I get up past Chapelizod, I know I'm on the home run.
"New York would be my priority, it'll be a very strong field. I wouldn't say I left plenty in the tank today but maybe a small bit with an eye on next week.
"I'll relax tonight, I won't be out celebrating or anything like that!"
