Glacier NP — Highline Trail to Granite Park

The stream flow data in this briefing is sourced from Central California gauges (Salinas River, Alameda Creek, Llagas Creek) — none of these reflect conditions on the Highline Trail. Disregard those numbers entirely. That said, Glacier NP in early November can have meaningful flow from recent snowmelt or rain pulses, especially at elevation crossings. Scout every crossing on approach and do not assume November means low water. Without local gauge data, this is the single biggest unknown on the trip.

Weather is the good news. Tuesday and Wednesday are clean — highs around 46-48°F, winds under 5 mph, mostly sunny. That's about as good as early November gets on the Highline. Snowpack at area SNOTEL stations is showing 0 inches depth, so the trail itself should be largely snow-free at lower elevations, though Granite Park sits around 6,600 feet and you may encounter patchy snow or icy sections on north-facing terrain in the shade. No avalanche forecast zone covers this area, so that's a non-issue.

Thursday changes the picture. A 43% chance of rain and snow arrives Thursday with SW winds building to 9-15 mph overnight. If you're planning to be out Thursday, plan your exit early — by late morning. Wet snow above 6,000 feet combined with rising winds on exposed Highline terrain is uncomfortable at best and a hypothermia risk at worst. Thursday night stays above freezing at 34°F but that wind chill on the ridge will be real.

With only 9 hours 47 minutes of daylight and sunset at 5:13 PM, your effective travel window is tight. Start moving by 7:30 AM at the latest to give yourself full use of the day. Build in your camp setup time before 4 PM — headlamp navigation on the Highline in November is not where you want to be. Plan your Thursday exit to be well below treeline before the precip arrives.