Mallard Lake

Overview

Mallard Lake is a quieter escape steps from the Old Faithful bustle. Expect a moderate, steady climb through lodgepole pine recovering from the 1988 fires to a small, tranquil lake on the Central Plateau. Reported round-trip distance ranges from about 6 to 7.5 miles; plan on roughly 7.0 miles total with about 900–1,000 feet of elevation gain. It’s an out-and-back by default, with longer loop options if you connect other trails.

Trail Experience

From near the Old Faithful Lodge cabins, cross the bridge over the Firehole River and pick up the signed path. Early on you’ll pass hydrothermal features (Pipeline Hot Springs) and then roll into forest and rocky gullies. The tread is natural and sometimes rocky, with a consistent, not-brutal grade. Keep an eye out for volcanic outcrops streaked with red lichen, boulder-lined drainages, and the unmistakable patchwork of old burn and new growth in the lodgepole stands. Wildflowers can pop in summer—think paintbrush, lupine, asters, and more. As you gain elevation, you may snag distant peeks toward the geyser basin.

The lake itself is small and calm, bordered by grass and forest. It’s more about solitude than big, dramatic views. Many hikers linger on the south shore for a snack before returning the same way.

Difficulty, Crowd Level, and Who It’s For

Moderate overall: steady climbing, some rocky sections, and altitude but nothing technical. Compared to the boardwalk crowds, traffic is light—often pleasantly so. It’s reasonable for fit beginners and families with older kids who can handle a sustained climb.

Wildlife and Safety

This is bear country with both black and grizzly bears reported—carry bear spray and know how to use it. Moose and deer are possible near wet meadows. Mosquitoes can be fierce in early summer; come prepared. Weather can flip quickly, including late-June snow squalls, so pack layers and enough water.

Camping, Fishing, and Swimming

There are backcountry campsites at the lake (reservations/permits required). The lake is effectively fishless, and swimming isn’t recommended.

Loops and Extensions

If you want more miles, continue via the Mallard Creek Trail and return using the Powerline corridor and Upper Geyser Basin connectors for an 11–12 mile day, depending on your exact routing.

Best Time to Hike

May through September is the typical season. Early season can bring lingering snow and mud; June–July bring peak mosquitoes. For cooler temps and fewer bugs, aim for late August to September. Start early for solitude and softer light on the forest and lake.

Tips and Tricks

• Bring bear spray, bug repellent, plenty of water, and consider trekking poles for the steady grade.
• Stay on trail near hydrothermal areas by the start—ground can be thin and unstable.
• If you’re camping, arrange the proper backcountry permits and food storage.
• Manage expectations: this one’s about a quiet forested hike and a peaceful lake, not marquee Yellowstone vistas.