This is the list of stuff you need to cary on every hike
- Navigation (GPS + Map and compass)
- Sun protection
- Insulation (extra clothing)
- First-aid supplies
- Fire (waterproof matches, lighter, flint)
- Repair kit and tools
- Nutrition (extra food)
- Hydration (extra water, or means to purify water)
- Emergency shelter (This can be as small as a space blanket or as much as a tent / sleeping bag)
Beyond this list you should consider the following.
Fabric- In the backcountry you really should not wear cotton. Cotton does not insulate when it is wet and it takes a very long time to dry. You should buy some quality quick drying / wicking synthetics.
- Jacket - You will probably want to get a good "shell" this should be a lightweight, breahtable, waterproof material such as e-vent or gortex.
- Hiking pants - I am a big fan of the convertable hiking pants (zip off into shorts). Tempuratres in colorado vary greatly so it is nice to easily switch between pants / shorts
- Headlamp - You never know when you will be out later than you planed, or need an "alpine" start to bag that 14er.
- Hiking socks - good wool hiking socks are super comfy, and will do wonders in protecting your feet from blisters when logging long miles on the trail.