Driving Calgary to San Francisco: ~2,090 km, 29–33 Hours Nonstop

Distance: ~2,090 km (1,300 mi)
Nonstop drive time: 29–33 hours
Realistic: 3–4 days with rest, border, meals

🛣️ Segment Breakdown (via I-15 S / I-5 S):

1. Calgary → Great Falls, MT: 760 km, 7–8 hrs (cross at Sweetgrass/Coutts)
2. Great Falls → Butte, MT: ~350 km, 3.5 hrs
3. Butte → Missoula, MT: 180 km, 2 hrs
4. Missoula → Boise, ID: 530 km, 5.5 hrs (I-90 W → I-15 S → I-84 W)
5. Boise → Sacramento, CA: 710 km, 7 hrs (I-84 W → I-5 S)
6. Sacramento → San Francisco: 140 km, 1.5 hrs

Alternate: Calgary → Spokane → Seattle → I-5 S (longer, scenic).

⚠️ Critical Factors:

• Border crossing (Sweetgrass/Coutts): 30 min–3+ hrs; have passports, NEXUS, vehicle docs.
• Winter (Oct–Apr): Snow, ice, closures (Rogers Pass, Siskiyou Summit). Chains required.
• Fuel/food: Plan stops—long stretches in MT/ID/OR.
• Time zones: Cross MST → PST (gain 1 hr).

Fly YYC→SFO (2.5 hrs) for speed; drive for scenery/road trip.