Jul 10

Jul 10 - Jul 12

Les Régates de Valleyfield

INB

St-Laurence River

Salaberry-de-Valleyfield, CN

Jul 11

Jul 11 - Jul 12

Silver Cloud Hotels and Codling ...

VINTAGE-INB-KPH-MOD-SO-OPC-J CLSES

Black Lake

Olympia, WA

Jul 17

Jul 17 - Jul 19

2026 Stock Outboard Nationals - ...

SO;N-J CLSES

Lake Neatahwanta

Fulton, NY

Jul 18

Jul 18 - Jul 19

Rumble in the Hills

INB

Rocky Fork State Park

Hillsboro, OH

Jul 18 - Jul 19

Northland Mardi Gras Gran Prix

OPC

Flambeau River

Ladysmith, WI

Jul 23

Jul 23 - Jul 26

2026 APBA Modified / Junior Nati...

MOD;N-J CLSES

Saint Joseph River

Constantine, MI

Jul 24

Jul 24 - Jul 26

Apollo Columbia Cup

VINTAGE-INB-UNL

McNary Pool, Columbia River

Kennewick, WA

Jul 25

Jul 25 - Jul 26

Leonardtown Bash on the Bay

VINTAGE

Breton Bay

Leonardtown, MD

Jul 25 - Jul 26

Frank Lara Tribute Race

OB RR

Klamath River

Klamath, CA

Jul 25 - Jul 26

ASBR Pro Racing Series Race #3

JET SPRI

Extreme Sports Park

Port Angeles, WA

Jul 25 - Jul 26

Serpent Lake Powerboat Races

OPC

Serpent Lake

Crosby, MN

Jul 30

Jul 30 - Aug 2

2026 APBA/USTS PRO NATIONAL CHAM...

PRO;W

Lake DePue

DePue,IL, IL

Jul 31

Jul 31 - Aug 2

Seafair Hydroplane Race

VINTAGE-INB-UNL-J CLSES

Lake Washington

Seattle, WA

Aug 1

Aug 1 - Aug 2

Xinsurance Great Lakes Grand Pri...

OS;N

Lake Michigan

Michigan City, IN

Aug 1 - Aug 2

Thunder on the Niagara

INB

Niagara River

North Tonawanda, NY

Aug 8

Aug 8 - Aug 9

TCPBA Chetek Watermania VI

OPC

Lake Chetek

Chetek, WI

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Inboard Endurance Menu

Inboard Endurance

Inboard-Endurance

In the early days of powerboat racing, Inboard Endurance races were ultimate test; the 100-500 mile races challenged both man and machine to the limits of their abilities, and then challenged them to go further. The rich history of Inboard Endurance racing and the marathon races of the 1960's and 70's have helped to shape this category to what it is today. While today's inboard endurance races typically run from 15min to 1hr, the attitude hasn't changed. Inboard endurance racers push themselves and their boats as hard as they can for as long as they can, and hope that it holds together.

Currently there are three competing classes of IE in the APBA - Grand National Class, Competition Jet, and GPS 95. Today's races generally run about 15 minutes each, with an occasional 30-minute or 1-hour event. The all-out "push it as hard as you can, hope it holds together" attitude has always been the trademark of a great GN race. From the drop of the green flag launching the crowd-pleasing Le Mans start, through the checkered flag signaling victory, you are guaranteed to enjoy the show.

Do you think you have what it takes to build and run hulls and engines to withstand the grueling test of an Inboard endurance race?

Inboard Endurance Resources

Inboard Endurance Classes