Stal is tied with Felipe Aguilar and Morten Orum Madsen for the lead after the first round of the tournament. Eight players are a stroke back at 3-under and 11 others are just two strokes off the lead.
Stal, 21, is a 2012 Challenge Tour graduate. He took a share of the lead with a steady round. He made the turn at 1-under after a birdie at the sixth hole. Back-to-back birdies at Nos. 10 and 11 pulled him close to Aguilar's early lead and a birdie at 15 allowed him to match the 68.
Aguilar had a pair of birdies and a pair of bogeys in his first eight holes Thursday but also racked up four birdies in the next seven holes.
Madsen, like Stal a 2012 Challenge Tour graduate, played the second nine at the Parador de El Saler course first Thursday. He had a bogey at the 12th hole but also four birdies over the span of Nos. 11-16. A birdie at the par-5 fifth allowed him to claim part of the lead.