Equinox, heat & trail risk
The spring equinox lands today, March 20, marking longer days and a surge in trail traffic—perfect for hikes but expect variable conditions depending on region ( ). Outside Magazine flagged record heat in Southwest trails with triple‑digit temps prompting some closures for heatstroke prevention, while Colorado Springs trails are already busy in the 50s–60s but still muddy in places—check AllTrails or state sites before you go ( ).
The vernal equinox for 2026 falls on Friday, March 20 at 14:46 UTC (10:46 a.m. EDT / 8:46 a.m. MDT), the precise instant astronomers mark when the Sun crosses the celestial equator. (timeanddate.com) Forecast models and regional meteorologists say this early‑season heat surge could produce record March readings across more than 100 cities in roughly 10 states, a pattern forecasters link to a strong, persistent high‑pressure ridge over the West. (weather.com) City managers in the Phoenix metro identified specific high‑use routes for temporary daytime shutdowns this week — Echo Canyon and Cholla on Camelback, the Piestewa Peak summit trail, and multiple South Mountain alignments — with parking lot gates slated to close 8 a.m.–5 p.m. during the official warning window. (kjzz.org) Those steps sit atop a policy Phoenix expanded after 2021; Parks officials say the city recorded 45 excessive‑heat closure days last year and pointed to rising mountain rescues as a driver for adding more trails to the heat‑closure list. (abc15.com) The National Weather Service placed the Phoenix forecast area under an extreme heat watch/warning tied to that same ridge for the March 19–22 period, linking the agency’s watch products to municipal access restrictions and operational changes. (weather.gov) Front‑range recreation areas are entering the regional “mud season,” when thawing snow and spring rains typically saturate paths from late March through May and make trails especially prone to erosion and damage. (blog.walkingmountains.org) Local trail‑management data show why shoulder‑season crowds matter: the Manitou Incline uses a mandatory free reservation and waiver system to limit users, and AllTrails catalogs roughly 285 trails in the Colorado Springs metro area — numbers that help explain heavy use even before peak summer. (coloradosprings.gov) State and municipal condition feeds remain active: Colorado’s COTREX mapping service and user‑report platforms like AllTrails publish day‑of trail reports, while Phoenix attractions such as the Desert Botanical Garden temporarily shifted hours and offered late‑evening entry promotions amid the heat response. (trails.colorado.gov)
