Last updated: September 22, 2025
Thing to Do
Mallard Lake Trail
NPS / Addy Falgoust
The trail crosses the Firehole River, passes Pipeline Hot Springs, and climbs rolling hills of partially-burned lodgepole pine and open, rocky areas to the lake.
Safety notes: Be aware of bear activity. Return the same way.
Trailheads: From the southeast side of the Old Faithful Lodge cabins, take the first right turn and continue 0.2 miles (0.3 km) across the Firehole River to the trailhead.
Details
Duration
3-6 Hours
This is a 7-mile (11.2-kilometer) there-and-back trail that begins and ends at the same trailhead.
Activity
Hiking
Moderately easy hike
Pets Allowed
No
Activity Fee
No
Entrance fees may apply, see Fees & Passes information.
Location
Upper Geyser Basin
This trail is located in the western part of the park, with the trailhead east of Old Faithful Geyser.
Reservations
No
Season
Winter, Summer, Fall
Time of Day
Any Time
Accessibility Information
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