The Grinnell Lake trail is an easy trail with no difficulties, unless you encounter one of Glacier (Montana) National Park's famed grizzlies. We saw one on this trip but he was high up an avalanche slope. The trail follows the shore of Swiftcurrent Lake then Lake Josephine. It then crosses the creek at the inlet of Lake Josephine and heads in throught the forest to Grinnell Lake. Near the end of Lake Josephine, the trail branches right for Grinnell Glacier, a more difficult and longer hike, but very popular. Once you get to Grinnell Lake you're pretty well finished unless you want to try bushwacking around the lake. We tried it and it gets pretty thick at times.
Return the way you came or follow the opposite shore around Lake Josephine. Distance is one way.
The trailhead is at the Many Glacier area of Glacier National Park (Montana). A well signed parking area is just before you get to the Swiftcurrent Motor Inn.
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