Millcreek Canyon hikers can expect peak fall color around the first week of October, but this year's drought could leave the display less vivid than usual.

Salt Lake County's leaves are forecast to hit their brightest between Sept. 30 and Oct. 6, according to a county-by-county prediction from MoreThanJustParks.com, as the Salt Lake Tribune reported Sept. 9. KSL meteorologist Matt Johnson separately named Millcreek Canyon among the Utah areas expected to begin changing first, with maples leading the way in mid- to late September and aspens following in early to mid-October.

The forecasts carry a big caveat. MoreThanJustParks.com warns its predictions could be off by up to 15 days in either direction because it has no calibration sites in the West. OpenSnow meteorologist Alan Smith offered a slightly later window, expecting both northern and southern Utah to peak in early to mid-October.

Utah's record-warm winter and poor 2025–26 snowpack complicate the picture. Smith said drought can lead to earlier color changes and duller pigments. Johnson put it plainly: "Drought stress will cause some early color turn, dull pigments, and leaf-fall in areas. But there will also be sections of vibrant color, especially at the highest elevations where soil moisture has been best."

Late-summer rain may help. Utah received about an inch more rain than the August median, a 55.5% increase, according to data from the Natural Resources Conservation Service (NRCS). July rainfall also topped the median by nearly an inch, or 57%. Smith said warm days paired with cool nights and above-normal late-summer rain can boost vibrancy.

USU Extension forestry specialist Darren McAvoy told Johnson that spring moisture and monsoon rainfall could lessen some effects of the dry winter, particularly in southern Utah.

OpenSnow forecaster Evan Thayer said red bigtooth and Rocky Mountain maples typically show color first at middle and upper elevations in mid-September. Quaking aspen follow as colors spill into lower elevations. Thayer told the Salt Lake Tribune that timing remains unpredictable, noting a single storm with high winds can ruin an otherwise good foliage year.

Patchy mountain colors were already visible across Utah as of late August, KSL reported. Peak valley foliage typically begins in October and lingers through mid- to late month.

As we reported Sept. 8, the same drought driving bears toward Wasatch canyons is shaping this year's leaf season. Hikers heading into Millcreek Canyon should watch for updated conditions on OpenSnow's Fall Colors Map, which updates twice weekly.