Colwyn Bay clung on for a defiant draw at home to leaders Lytham.
The visitors were put in and amassed 256-4 declared off 49.3 overs, Akash Vashisht hitting 113 and skipper Matthew Taaffe 71 not out.
Jack Parry, Paul Jenkins, Arthur Jones and Sam Bright took a wicket apiece for the hosts.
Bay batted out 56 overs to end 192-9, Zack Gidlow 46, Will Sissons 35 and skipper George Johansen 33.
Vashisht scooped 4-60 and Toby Lester 3-50 for Lytham.
After being bowled out for just 97, Prestatyn took six Alder wickets but were unable to prevent their visitors crossing the winning line.
Leo Teal top-scored with 21 in the home side’s low total, put together after they decided to bat. Mark Chappell took 4-33 and Greg Coogan 4-45 for the away side.
Alder made it to 100-6, Sampath Perera claiming 3-28 for the Welsh team.
Lytham (25) 239-4 dec (Shaun Davies 2-59) Colwyn Bay 103-10 (Ed Williams-Gray 45, Tom Roberts 25)
Old Xaverians (25) 176-7 dec (Renit Adke 4-32, Harry Williams 2-36) Northop Hall (7) 152-10 (Liam Evans-Ford 42)
Caldy (25) 210-5 dec (Ashley Jones 2-34, Steven Edwards 2-55) Prestatyn (4) 101-10 (Ashley Jones 51, Jack Cheetham 23)
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