ISR 2020 is scheduled for May 16 &17

ISR 2019 Sponsors


Davenport, CA is home to the legendary ISR MoM race which is held in the spring on the California coastal bluffs overlooking Waddell Creek State beach. Click here for a Google Map showing the location or put these coordinates into Maps: 37.08787762255147, -122.27248492670155. The race draws competitors from California and around the world. The ISR never fails to provide excitement for both Man on Man racing fans and pilots alike. This year’s Davenport International Slope Race will be held at Davenport on June 8 and June 9, 2019 and is hosted by NCSS, Norcal Slope Soarers Inc., AMA Charter Club #4494. The ISR is only possible due to the kindness and hospitality of Big Creek Lumber Company, NCSS, and all the pilots and workers who help make it happen.

Mission Statement

The event mission is to host the premier MoM race per NCSS Rules (not FAI) at the Big Creek Lumber Company’s landing strip which is just South of Waddell Creek on Highway 1. Each race heat is 8 laps between two or three pilots/planes with a flying start after a 1 minute climb out. The course is 458 feet between bases, 916 feet (
(305.3 yards) per lap or 1.39 miles per 8 laps. We run as many races each day as wind and time allow. Safety is critical to NCSS and is a key part of how the race is run.

Register for the ISR

There are three way to participate in the ISR

Open Class: Open class is for pilots with previous ISR experience. Register.

Sportsman class: This class is ideal for those slope pilots that are new to the ISR. Heats are limited to two pilots and coaching is provided by the Open Class guys. Register.

Volunteer: The ISR is not possible without at least six volunteers to run the bases. It is a great way to experience the ISR and also be part of it. We appreciate the help we receive so much that we have a volunteer raffle with great prizes. The grand prize winner usually takes home a molded glider! Other prizes include gift certificates, glider bags, T-shirts, hats and more. This is also a great opportunity to take care of you work days as an NCSS club member. You can volunteer for Day 1, Day 2, or both. Volunteers are not allowed to also register as pilots in either class. There is no cost to volunteer and lunch will be provided.

Day 1 volunteer registration Day 2 volunteer registration


The Davenport International Slope Race is held every year on the coastal bluffs near Wadell Creek State Beach. The flying site is just across the highway from Big Creek Lumber Company ( Map Link ). The Registration pages also have a live Google map showing the location Plan your trip from Half Moon Bay (drive 31 miles South) or Santa Cruz (drive 18 miles North) along Highway 1.