West of Madawaska the line generally follows the meandering southern shore of the Madawaska River, crossing on a bridge to the northern bank just north of Whitney, where the river widens considerably. This was the start of another logging railway, the Whitney and Opeongo Railway, which ran northwest to Lake Opeongo to carry logs to the St. Anthony Lumber Company in Whitney. From Whitney, the line turned west again through Airy, following the lakes and rivers through Algonquin Park. After reaching the Highland Inn it started northwest again, leaving the park and reaching Kearney, and running the short remaining distance to the multi-part junction with the Northern and Pacific Junction Railway at Scotia.