Gallatin Gateway is twelve miles southwest of Bozeman on the Gallatin River. It is located at the mouth of the canyon on the road leading to Yellowstone National Park. Located in the Custer Gallatin National Forest near Gallatin Gateway, visitors can enjoy Spire Rock Campground and Spanish Creek Picnic Area. From the Spanish Creek parking area there are many options for ski routes into the Lee Metcalf Wilderness. Kirk Wildlife Refuge provides fishing access along the Gallatin River.
After driving down US 191 through the Gallatin Canyon from Bozeman, enter Yellowstone National Park via West Yellowstone. Take the lower loop, starting at the Madison Junction. Look for Trumpeter Swans on the rivers and bison on the roads. Stop to walk the boardwalks of all the geothermal features, including Grand Prismatic Spring. Continue on to see the ever-punctual Old Faithful and stop for a night at the Old Faithful Lodge. The next day, drive to Yellowstone Lake and spend a day on the water. Finish your lower loop journey by driving through the Norris Geyser Basin for more geothermal wonders. After driving down US 191 through the Gallatin Canyon from Bozeman, enter Yellowstone National Park via West Yellowstone. Take the lower loop, starting at the Madison Junction. Look for Trumpeter Swans on the rivers and bison on the roads. Stop to walk the boardwalks of all the geothermal features, including Grand Prismatic Spring. Continue on to see the ever-punctual Old Faithful and stop for a night at the Old Faithful Lodge. The next day, drive to Yellowstone Lake and spend a day on the water. Finish your lower loop journey by driving through the Norris Geyser Basin for more geothermal wonders.
Source: http://www.visitmt.com/yellowstone/trip-ideas/bozeman-to-norris-geyser-basin.html