Fall Foliage in Idaho: 2026 Peak Color Forecast

Q: When is peak fall foliage in Idaho in 2026?

Peak color in Idaho typically runs September 28 to October 14. Exact timing shifts one to two weeks year to year — a warm, wet autumn pushes peak later, while drought stress or an early hard frost accelerates it.

Q: When do leaves start changing in Idaho?

Color usually becomes noticeable around September 15, starting with Sawtooths & high country (late September) and spreading across the state over the following weeks.

Q: How late can you see fall colors in Idaho?

Most years the show is largely over by October 25. North Idaho larch holds color latest (mid to late October), and oak-dominated woods keep muted color for another week or two beyond the maples.

Q: What are the best fall foliage drives in Idaho?

ID 21, the Ponderosa Pine Scenic Byway; ID 75 through the Sawtooth Valley; US 12 along the Lochsa. Go midweek during the peak window if you can — the marquee routes draw serious weekend traffic at peak.

Q: What trees produce Idaho's fall color?

The palette here is built on aspen, cottonwood, birch, western larch. Reds and oranges come from anthocyanins that sugar maples and red maples manufacture in sunny, cool-night weather; the yellows in birch and aspen are carotenoids that were in the leaf all summer, unmasked when chlorophyll breaks down.

Q: Will 2026 be a good color year in Idaho?

The recipe for a great year is a moist growing season followed by a sunny September of warm days and cool — not freezing — nights. Watch late-summer drought maps: stressed trees turn early and dull. The windows on this page are the reliable planning anchor either way.

Q: How long does peak color last in Idaho?

In any single spot, expect 5–10 good days. Statewide, the window runs September 28 to October 14 because Sawtooths & high country (late September) and North Idaho larch (mid to late October) are staggered — if you can move, Idaho gives you weeks of peak somewhere.

Q: What if I miss peak in Idaho?

Chase the stagger: earlier terrain has already peaked, later terrain hasn't yet. Arrive too early and head for Sawtooths & high country; too late, drop to North Idaho larch. The color map on this page shows today's estimated status across the area you search.

Typical peak September 28 to October 14. Region-by-region timing, the best drives, and how this autumn is tracking.

Peak color window is open right now

Color starts

Sep 15

Typical peak

Sep 28 – Oct 14

Season ends

Oct 25

The Idaho color season at a glance

Typical window, checked against today's date

Today

Idaho's typical peak-color window against the fall season. Any single year lands within about ±1–2 weeks.

late September

Sawtooths & high country

turns first

mid to late October

North Idaho larch

turns last

aspen

signature tree

September 28

typical first frost

color usually beats it

Sawtooth Valley aspen peak in late September; a month later the larch light up the Clearwater and Panhandle forests — Idaho's quiet encore.

Interactive

Where the color is around Idaho right now

Enter a ZIP code (or explore the default view) to see estimated color status across the surrounding terrain — higher elevations and more northern valleys turn first, and the map adjusts for both.

Estimated color status around Boise, ID, computed from the state’s typical peak window adjusted for each area’s elevation and latitude (higher and more northern terrain turns earlier). Try the Terrain style to see why ridgelines turn first. A climatology-based estimate — scout reports and webcams beat any model in the final week.

Region by region

Idaho doesn’t peak all at once

Elevation and latitude stagger the show — every thousand feet of elevation moves peak roughly a week earlier, and the north edge of a state can run two weeks ahead of its south. That’s good news for trip planning: miss one window and the next region over is often just entering its own.

Region	Typical peak
Sawtooths & high country	late September
River canyons & Boise foothills	early-mid October
North Idaho larch	mid to late October

Golden trees mirrored in a still lake at peak color — Water doubles the show — calm mornings give lake and river routes their mirror finish before the wind comes up.

The season, phase by phase

How the Idaho color season unfolds

First color · September 15 starting

Swamp maples and stressed roadside trees flip first. Around September 15, Sawtooths & high country leads the state (late September) while lower terrain stays green. Scouting weekend — not yet the show.

Peak window · September 28–October 14 the show

The statewide sweet spot. Color rolls through each region on the schedule below, and the famous drives hit their best light. Book lodging early — this is the window everyone chases.

Late color · to October 25 fading

North Idaho larch holds out longest (mid to late October). Oaks and beeches keep russet and copper tones after the maples drop, and bare-branch views open up — quieter roads, softer palette, zero crowds.

After the season plan ahead

Once leaf-drop finishes, the same windows reset for next year — they're driven by day length first, weather second. Bookmark this page; the status is checked against today's date.

Golden oak canopy in late-autumn sunlight — The late shift: after the maples drop, oaks and hickories carry deep golds and russets for another two weeks.

Where to go

The best foliage drives in Idaho

ID 21, the Ponderosa Pine Scenic Byway

The marquee route — plan it for the heart of the September 28–October 14 window and go midweek if you can.

ID 75 through the Sawtooth Valley

Strong alternative when the main route backs up — similar color, a fraction of the traffic.

US 12 along the Lochsa

The connoisseur pick: pair it with an early start for empty-road light in the first hour after sunrise.

Photographer’s notes

Overcast days saturate reds and oranges better than harsh sun — don’t cancel for clouds. The half-hour after sunrise gives backlit leaves their glow, and a light rain the night before deepens every color on the road. Dominant trees to look for here: aspen, cottonwood, birch, western larch.

Make the weekend count

Planning a Idaho leaf trip, step by step

6–8 weeks out

Book lodging for the September 28 to October 14 window now. Peak-weekend rooms near the marquee drives sell out far ahead — a midweek stay inside the window beats a Saturday scramble at its center.

2 weeks out

Check this page's live status and the late-summer drought picture. Dry years pull Idaho's peak earlier; wet warm autumns push it later. Adjust which sub-region you target, not the whole trip.

Trip week

Run the color map above for your base town and pick the drive that's inside its window today. If your target already peaked, shift toward North Idaho larch; still green, head for Sawtooths & high country.

On the day

Shoot the first two hours after sunrise and the last two before sunset — backlit maples glow, midday glare flattens color. Overcast after rain is the secret weapon: saturated leaves, no shadows, empty pull-offs.

Why timing moves

What shifts the 2026 peak earlier or later

Red maple leaves at peak color against a blue sky — Anthocyanin red: maples manufacture this pigment on sunny days with cool nights — the weather recipe that decides how good a year gets. (Image credits: /images/seasonal/SOURCES.txt)

Leaf color is triggered by shortening days — that part is identical every year. Weather sets the quality and the exact week. The recipe for a spectacular season: a wet growing season, then sunny warm days with cool (not freezing) nights through September. That combination traps sugars in the leaf and builds anthocyanins — the reds and crimsons.

Drought pushes trees to turn early and drop fast; a warm autumn delays everything and mutes the reds; a hard early freeze or one good windstorm can end a local peak in 48 hours. For reference, Idaho's typical first frost lands around September 28 — peak color usually beats it by a couple of weeks, which is exactly why the two calendars are worth planning together.

Common questions

Idaho fall foliage FAQ

When is peak fall foliage in Idaho in 2026?

When do leaves start changing in Idaho?

How late can you see fall colors in Idaho?

What are the best fall foliage drives in Idaho?

What trees produce Idaho's fall color?

Will 2026 be a good color year in Idaho?

How long does peak color last in Idaho?

What if I miss peak in Idaho?

Keep planning

Plan the rest of your Idaho fall

Idaho first frost datesTypically September 28 — the freeze that ends the garden season.Idaho hummingbird departuresMost leave around August 28 — right as the leaves turn.Idaho tick forecastTicks stay active on warm fall hikes until a hard freeze — check before you leaf-peep.

More Rockies foliage forecasts

Windows are climatological typicals compiled from state tourism foliage reports, USDA Forest Service fall-color guidance, and NOAA climate normals. Any single year can run 1–2 weeks either side. National picture: where peak color is right now →