Cell signal inside Banff & Yoho National Parks

Sundance Canyon trail, Banff National Park

21 Aug 2026, 12:27–13:41 MDT, Rogers SIM. Walked from Cave Avenue along the Sundance trail and up into Sundance Canyon, about 3 km from the townsite.

• 123 readings; 79 at −113 dBm or lower.
• In the canyon, signal fell to −132 to −138 dBm.
• From 13:20 to 13:31 (about 11 minutes) the phone showed zero bars and reported no carrier.

Trans-Canada Highway through Banff & Yoho

31 May 2026, 11:42–13:06 MDT, eastbound, Rogers SIM, one reading every ~5 seconds. This older app version logged only online/offline, not signal strength.

• 770 readings between Yoho's west side and the Banff east gate.
• One fully offline stretch in Yoho National Park, just west of Kicking Horse Pass (~51.44° N, 116.35° W): about 30 seconds at ~100 km/h, roughly 850 m.

What this is not

One carrier, one pass per place, one consumer phone — not calibrated drive-test gear. Treat it as a spot measurement worth checking, not a coverage map. Signal values are what Android reports; "no carrier" means the phone reported no network operator at that moment.