Bryce Whitmore designed the modern whitewater inflatable pontoon boat, and in fact designed several models. The one that has been produced the most is a three-tube model of unparalleled maneuverability and load bearing capacity. This boat which is fourteen feet overall, can carry 6 passengers, their baggage, and a guide.Not all Pontoon boats are 14 feet long. Some are 8 or 9 feet long as well. Pontoon boats come in all sizes and prices from $200 to $1,000. Users looking for an 8 foot Pontoon sho.