Eric Thomason and Morgan Aldridge were the winners at the fourth race of the Chainwreck Cyclocross Series on Thursday at Tsalteshi Trails in Soldotna.

In this cyclocross series, the leader completes as many 1.5- to 2-mile laps as possible in 30 minutes or less. Nobody starts a lap after the leader finishes. The courses require riders to dodge obstacles and dismount and mount the bike.

Thomason finished four laps in 30 minutes for the victory, while Brian Beeson was second at four laps in 30:43. Aldridge was the top women’s rider, and fifth overall, by finishing five laps in 32:04. Sarah Hobart was the next woman across the line with three laps in 33:35.

The fifth and final race of the cyclocross series will be Thursday at the Skyview Middle School trailhead at Tsalteshi. Registration starts at 5:45 p.m., while racing is at 6:15 p.m.

The results follow:

1. Eric Thomason – 30:00 (4); 2. Brian Beeson – 30:43 (4); 3. Marc Romano – 31:22 (4); 4. Ben Boersma – 31:52 (4); 5. Morgan Aldridge – 32:04 (4); 6. Tom Kobylarz – 33:06 (4); 7. Rob Carson – 34:23 (4); 8. Jamie Nelson – 35:09 (4); 9. Mark Beeson – 35:15 (4); 10. Dave Edwards-Smith – 36:37 (4); 11. Jon Iannaccone – 37:18 (4); 12. C.O. Rudstrom – 38:38 (4); 13. Jeff Helminiak – 39:31 (4); 14. Will Morrow – 30:18 (3); 15. Sarah Hobart – 33:35 (3); 16. Kelly Sederholm – 38:06 (3); 17. Mindee Morning – 38:06 (2).