Mountain driving in Colorado and California demands respect and preparation. Before ascending, check weather conditions and chain requirements - conditions change rapidly at elevation. Downshift before steep descents, not during. Use lower gears to control speed through engine braking rather than riding your brakes. Overheated brakes can fail catastrophically on long downgrades. Watch for runaway truck ramps and know their locations. If brakes overheat, use them immediately - they're designed to save your life. Take hairpin turns wide and slow. Use both lanes when legally permitted on tight switchbacks. Be especially cautious of your trailer swing on sharp corners. Watch for altitude sickness effects on yourself and reduced engine power at high elevations. Stay hydrated and alert. Colorado's I-70 and California's I-80 and Grapevine demand full attention. Respect the mountains, drive defensively, and arrive safely every time.