From Gallatin County you can reach 7 fall color locations and 1 scenic byways in Montana, for day trips that range from a one-hour hike to a full-day drive.
Across the destinations we track around Gallatin County, peak colour has historically landed in Late September to Early October, measured from NASA MODIS satellite records at those spots.
Each date above is a multi-year climatology built from NASA satellite observations at that specific spot, with the definition of peak calibrated against ground cameras — not a regional average wearing a local name. Where a location has no usable observations of its own, we withhold the date and point you somewhere nearby that does.