The 24-year-old moved to Belle Vue at the start of March and has gone on to make 10 appearances for the Betfred Super League club.
Hadley has not featured since fracturing his cheekbone in Wakefield's victory over Leigh Centurions a month ago but is set to return against Leeds Rhinos on Saturday.
We are delighted to announce that @DeanHadley11 has extended his loan deal at Trinity for another month pic.twitter.com/AJAwUKhdgP
— Wakefield Trinity (@WTrinityRL) June 5, 2017
