Jul 19

Jul 19 - Jul 20

2025 ALTON MIDWEST NATIONALS

OPC

MISSISSIPPI RIVER

Alton, IL

Jul 19 - Jul 20

Thunder on the Choptank

INB

Choptank River

Cambridge, MD

Jul 19 - Jul 20

Northland Mardi Gras Gran Prix

OPC

Flambeau River

Ladysmith, WI

Jul 23

Jul 23 - Jul 27

2025 APBA/ USTS PRO National Cha...

PRO-KPH;N

Lake DePue

DePue, IL, IL

Jul 25

Jul 25 - Jul 27

Leonardtown Bash on the Bay

VINTAGE

Breton Bay

Leonardtown, MD

Jul 25 - Jul 27

APOLLO APBA GOLD CUP

SE-VINTAGE-INB-UNL

McNary Pool, Columbia River

Kennewick, WA

Jul 26

Jul 26 - Jul 27

Rumble in the Hills

VINTAGE-INB

Rocky Fork State Park

Hillsboro, OH

Jul 26 - Jul 27

Franks Race

OB RR

Klamath River

Klamath, CA

Jul 26 - Jul 27

Serpent Lake Powerboat Races

OPC

Serpent Lake

Crosby, MN

Jul 28

Jul 28 - Aug 2

2025 Stock, MOD, & J Outboard Na...

MOD-SO;N-J CLSES

Champions Park Lake

Springfield, OH , OH

Aug 2

Aug 2 - Aug 3

Great Lakes Grand Prix

OS

Lake Michigan

Michigan City Indiana, IN

Aug 2 - Aug 3

BATTLE ON THE COLORADO

OPC

LAKE MARBLE FALLS

MARBLE FALLS, TX

Aug 2 - Aug 3

Thunder on the Niagara

SE-VINTAGE-INB

Niagara River

North Tonawanda, NY

Aug 2 - Aug 3

Seafair Hydroplane Race

VINTAGE-INB-UNL-J CLSES

Lake Washington

Seattle, WA

Aug 8

Aug 8 - Aug 10

Sheboygan MidWest Challenge

OS;N

Lake Michigan

Sheboygan, WI

Aug 8 - Aug 10

Midwest Challenge

OPC

Lake Michigan

Sheboygan, 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