Every range, every peak.
U.S. mountain ranges with their peak inventory, watersheds, USGS streamgauges, and SNOTEL stations — the hydrology + climate context behind every named range. Built for hikers, climbers, watershed managers, and snowpack researchers.
What U.S. ranges are doing
The hydrology + climate context behind every named range — peak counts, snowpack coverage, and where to look first.
The U.S. is shaped by its mountain ranges — the Rockies drain into both the Colorado and Missouri systems and feed the West's water supply; the Sierra Nevada stores California's drinking water in winter snowpack; the Cascades wring moisture out of Pacific air masses; the Appalachians shaped the eastern half of American settlement. Snoflo joins each named range to its peaks, watersheds, USGS streamgauges, and NRCS SNOTEL stations.
Tap any range below for its peak inventory and the live hydrology context. Range pages link out to individual peak details, watershed-by-watershed breakdowns, and the SNOTEL stations that report from inside the range.
Mountain ranges across the country
Every range Snoflo tracks, with its peak count and the hydrology + snowpack monitoring inventory inside it.
About the mountain ranges data
What's in each range's inventory?
Every range page on Snoflo aggregates four datasets within its boundary: peaks (named summits), watersheds (HUC-8 basins that drain off the range), USGS streamgauges (the hydrology readings), and NRCS SNOTEL stations (snowpack / SWE measurements). Tap any range for the full inventory and live conditions.
How are range boundaries defined?
Range boundaries follow USGS / NPS published delineations where they exist; for ranges without an authoritative boundary we use community + topographic conventions. Edge cases (a peak that sits on the divide between two named ranges) are resolved consistently within Snoflo, but reasonable people disagree.
How fresh is the SNOTEL + streamgauge data?
SNOTEL transmits hourly; USGS gauges every 15 minutes. We re-pull throughout the day. The peak inventory is mostly static (summits don't move), but we add named subsidiary peaks as they get documented.
Why doesn't my favorite range show up?
We focus on ranges with at least one named peak, one watershed, and one SNOTEL or streamgauge in the area. Local subranges sometimes get folded into a parent range. If a range you care about is missing, drop us a note — we add coverage on request.
Is this useful for trip planning?
Yes — the SNOTEL + streamgauge data inside a range tells you how much snowpack is up high and what's running in the rivers below. For backcountry travel, always also consult your regional avalanche center and a current weather forecast.