Dewi Griffiths (Swansea Harriers) will defend his UK Inter-Counties Cross Country title at Loughbrough on Saturday.
Griffiths can also retain his British Athletics Cross Challenge Series title at the event which moves to a new venue at Prestwold Hall for 2017.
Dewi Griffiths (520) pictured in the Cardiff Cross Challenge
Cari Hughes (Menai Track & Field) was a winner in the U17 race last time but will now compete against the best U20 women in the country this weekend.
The U17 men's race will feature three Welsh athletes with a chance of claiming the prestigious series title. Dominic Smith (Swansea Harriers) and Matthew Willis (Wrexham AAC) joinlty lead the rankings with Oliver Barbaresi (Menai Track & Field) currently third.
Mia Roberts (Deeside AAC) will begin the U15 Girls race in second place overall.