Notes on a hike to Turcotte and Guthrie Lakes. One of a number of treks made out of Basin Depot. 
https://www.algonquinadventures.com/trails/DayHikeToTurcotteAndGuthrieLakes.pdf

Years ago there was a small bridge across the Bonnechere River just above Basin Depot, where a curve in the river runs close to Basin Depot Road. Once across, there was a trail that went over to Robitaille Creek and along the creek to Robitaille Lake. If anyone has walked that route, or knows of it, any information would be appreciated.