Driving Distance & Time: Duluth, MN to Boulder, CO
Distance:** ~1,378 miles (2,218 km) via fastest route.
Driving Time:** ~**21 hours 10 minutes** pure driving (Google Maps / typical routing).
Typical Route
**I-35 S → I-80 W → I-76 W → I-25 N → US-36 W / CO-119** (or I-70 W → CO-119).
- Duluth → Minneapolis (155 mi, 2h20m)
- Minneapolis → Des Moines (240 mi, 3h40m)
- Des Moines → Omaha (135 mi, 2h10m)
- Omaha → Denver (540 mi, 8h) — *longest single leg*
- Denver → Boulder (30 mi, 45m)
Real-World Planning
- 2.5 – 3 days with overnight stops (e.g., Des Moines, Omaha/Nebraska City, Denver).
- Winter (Nov–Mar): High risk of blizzards/ice on I-80 (Nebraska/Wyoming) and I-25/I-70 (Colorado). Carry chains, emergency kit, check 511ia.org, cotrip.org.
- Fuel: ~55–65 gallons ($200–$260 @ $3.80/gal).
Alternative:** Fly **DLH → DEN** (2h 15m, ~$300–$500) + rent car / bus to Boulder (45m). Often cheaper/faster than driving solo.
Wanderlust World