London 2012 Olympics 400m hopeful Rhys Williams won the Welsh Athletics Championships 200m in Cardiff in 21.85 seconds.
Colwyn Bay's Rachel Johncock added the women 200m title to the 100m she won on Saturday.
And Caryl Granville added the 400m hurdles title to her 100m hurdles crown.
In the men's events Paul Bennett also added a 400m hurdles triumph to his 110m hurdles win of the previous day.
Pole vaulter Paul Walker failed in his bid to equal Neil Winter's 1993 championship best and had to settle for a winning height of 5.21 metres.
On the first day of competition Sally Peake cleared 4.30m to break her own Welsh pole vault record.
There was also a strong performance from Carys Parry in the hammer, as the Commonwealth Games silver medallist came back from three months out with a broken arm to win in Cardiff.
"The Welsh Championships is always in my plan and I really wanted to come here and win," Peake said.
"I'm really glad to finally get that height, it was a goal at the start."
As well as securing the Welsh title, Peake's 4.30m mark was also enough to qualify her for the World University Games.
Another athlete trying a shorter distance with notable success was Joe Thomas, normally an 800m specialist, who raced to victory in the 400m, while in the women's event over the same distance Rebecca Williams had an easy win.