
Twenty Mile Trail — Short Lava Loop
Idaho Falls / Twenty Mile Trail, Idaho
Activity
Hiking / Volcanic
Distance
0.5 mi round trip
Elevation gain
~50 ft
Route
Loop
The adventure
Complete the separate half-mile loop at Twenty Mile Trailhead. This is the half-mile option.
Start at Twenty Mile Trailhead, complete the signed half-mile lava loop and finish back at the trailhead. Even the easy loop crosses rough lava. Plants colonize improbable places.
ONCE YOU’RE THERE Use the same signed Lava Trail road to the trailhead, then choose the short 0.5-mile loop rather than the main-vent route.
LOCAL INTEL Picnic area and portable toilets are normally present.
FEES, PERMITS & ACCESS No mandatory entrance, parking, access, permit, reservation, or similar fee is required to complete this Adventure as routed.
What to expect
- Complete the separate half-mile loop at Twenty Mile Trailhead.
- Use the same signed Lava Trail road to the trailhead, then choose the short 0.5-mile loop rather than the main-vent route.
Good to know
- SHORT VERSION
- This is the half-mile option.
- WATCH YOUR ANKLES
- Even the easy loop crosses rough lava.
- LIFE IN CRACKS
- Plants colonize improbable places.
- TRAILHEAD BASICS
- Picnic area and portable toilets are normally present.
- FIND THE TOUGHEST PLANT
- Admire the plant growing from the least reasonable crack.
- Fee
- Free — no required entrance or parking fee.
- Entrance fee
- No mandatory entrance, parking, access, permit, reservation, or similar fee is required to complete this Adventure as routed.
- Dogs
- unknown.
Photos

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