Big Bald Mountain, Mountain summit in New Brunswick, Canada

Big Bald Mountain is a summit in New Brunswick that rises to approximately 670 meters above sea level. The mountain sits within a landscape shaped by the Northwest Miramichi, Sevogle, and South Branch Nepisiguit rivers.

The summit formerly served as a fire lookout post where observers monitored the surrounding forests. This function ended when aerial surveillance systems replaced ground-based fire detection methods.

The name comes from the sparse vegetation on the summit, which gives the peak its bald look. The mountain rises 672 metres as part of the Appalachian system, beside Colonels Mountain and east of the Christmas Mountains, near the headwaters of the Northwest Miramichi River.

No maintained trails are documented for the mountain; access is through remote forest in the north-central part of the province. The summit is bare of much vegetation, so the top is open, but the surrounding bush is dense. Plan for a self-supported route and check conditions before setting out.

A fire-spotting hut stood on the bald summit, matched by a very similar hut on Mount Carleton, the province's highest peak. Rangers fixed wildfire locations by triangulating between these huts and other fire towers, a method used before aerial surveillance became widespread.