I-15 has a closure reported as of 2026-08-18T09:30Z, source: Caltrans; source freshness: healthy; coverage: full.

Fetch https://api-staging.mountainswitch.co/v1/routes/I-15/summary?jurisdiction=US-CA for structured route-summary detail.

## Coverage

This page shows conditions reported by MountainSwitch's listed I-15 sources along the full route, including Caltrans District 8 reports outside the Cajon Pass coverage above.

Route-wide reports don't expand the Cajon Pass answer, which covers only the stretch from south of Glen Helen Parkway (postmile 14.6) to the I-15 / SR-138 junction (postmile 21.64). I-15 reports outside that stretch — including the summit grade north to postmile 24 — appear here at route level only. SR-138, SR-2, I-215, and US-395 are context or detour routes and never part of the Cajon Pass answer.

MountainSwitch does not determine whether a route should be driven. Verify with Caltrans before traveling.