Day 1 | Sun July 18, 2027 | Boise to Green River UT

I-84 east -> I-15 south -> US-6 east via Soldier Summit and Price -> Green River. ~520 mi (blog estimate); 8–9 h (blog estimate). Positioning day. Twin Falls coffee; lunch Provo/Spanish Fork; second coffee Price. Shoshone Falls is not on the planned route. Verify Top Tier 91+ fuel stops.