She was powered by two Triple expansion steam engines and four Scotch marine boilers, developing 68.8 horsepower for a top speed of 18 mph.

Sagamo began her cruising career with the 1907 season, her maiden voyage taking place on 15 June under Commodore George Bailey, her first Captain.

[2] That year the Grand Trunk Railway expanded their station at Muskoka Wharf in Gravenhurst to accommodate the greater volume of traffic transferring from their trains to the Navigation Company's steamers.

The outbreak of World War I brought a depression to Muskoka Lakes tourism as the country turned its resources to materiel and many young men went overseas in uniform.

By this point the number of steamers run by the Navigation company had grown to nine, but an accident put the Nipissing out of commission in 1915, (permanently, as it turns out, with the hull later to be resurrected as the RMS Segwun).

In 1917 reflecting lower demand and higher priorities for the war, the Grand Trunk eliminated the overnight run to Gravenhurst and the number of day trains to two.

Management agreed and purchased property at the head of Little Lake Joseph which came to be known as "Natural Park" and served as a stretching point for what came to be known as the "One Hundred Mile Cruise".

[6] Management chose to rebuild the ship when they discovered the engines and machinery were intact and used the opportunity to add fifteen staterooms.

Management supplemented the cruise by adding a public address system in the ship which brought the live music from the lounge through the entire vessel.

The Muskoka Lakes Lines filed bankruptcy and the ships were repossessed by the Navigation Company who chose to fit the required equipment only on the flagship Sagamo and her companion the Segwun.

In September that year the company sold the steamers, including the Sagamo to Morgan Cyril Penhorwood, an accountant with no boating experience.

[9] Pendorwood took delivery in February 1955 in a newly formed company named Gravenhurst Steamships Limited, and retubed the Sagamo's boilers for what would prove to be the last time.

However, during renovations a fire broke out on 14 January 1969 which burned the entire wooden portion of the vessel, leaving only the steel hull.