Some cautions for newbies and visitors:

(1) Please be aware of the signs of acute mountain sickness (commonly referred to as altitude sickness, but is typically a mild form thereof) and ways to prevent it.

(2) Layers, layers, layers! The weather in one spot can change drastically in minutes, and if you're going up and down the mountains the changes can be even more drastic. Layers are your best bet. Snow in summer is not uncommon!

Winter sports, summer sports, mines, ghost towns, ghosts, rodeos, stampedes, dude ranches, onroad, offroad, high places, walking, running, hiking, biking, eating, drinking, camping, luxury hotels and resorts, festivals, national areas (parks, monument, memorials, recreation, historic, etc.), offbeat attractions, trains, and so on. You name it, Colorado probably has it! Here are a few teasers, for even more check out Colorado.com!

Curiosities and Other Things of Interest

Bishop's Castle

Missle Site Park Tours

Swetsville Zoo (Folk Art)

The Airplane Restaurant

UFO WatchTower

Oh so many more ...

Festivals and Fun Events

Blue Ribbon Bacon Tour

Frozen Dead Guy Days

Oh so many more ...

Ghost Towns

Independence Ghost Town

St Elmo & Tin Cup

Oh so many more ...

Haunts

Do ghosts give you the creeps, or do they entice you? Does the paranormal give you chill bumps of fear or excitment? If enticement and excitement, these might be the places for you!

The Stanley Hotel

Creede Hotel and Restaurant

Oh so many more ...

High Places

No, this has nothing to do with the state-level legalization of marijuana. High places, we have so many from which to choose. Great for driving, riding, biking, climbing, hiking, running, even boarding; you'll find quite the mix of locomotion methods going up and down.

14ers

Grand Mesa

Manitou Incline
Hike 1 mile with 2000 ft of elevation gain

Mount Evans

Rocky Mountain National Park - Trail Ridge Road

Pikes Peak

Mines

Mollie Kathleen Gold Mine

Hard Tack Gold Mine

Lebanon Silver Mine
In conjuction with Georgetown Loop Railroad

Oh so many more ...

National

Colorado is chock full (overview map) of national parks, preserves, monuments, memorials, trails, heritage areas, recration areas, and historic sites.

Bent's Old Fort National Historic Site

Black Canyon Of The Gunnison National Park

Cache La Poudre River National Heritage Area

California National Historic Trail

Colorado National Monument

Curecanti National Recreation Area

Dinosaur National Monument

Florissant Fossil Beds National Monument

Great Sand Dunes National Park & Preserve

Hovenweep National Monument

Mesa Verde National Park

Old Spanish National Historic Trail

Pony Express National Historic Trail

Rocky Mountain National Park

Sand Creek Massacre National Historic Site

Santa Fe National Historic Trail

Yucca House National Monument

Scenic Drives

On road or off road, in 2wd or 4wd, with two, three, or four wheels, Colorado has a scenic drive for you! Some of our favorites not already mentioned elsewhere in the Colorado offerings ...

Guanella Pass

Peak to Peak

San Juan Skyway
(Loop includes Million Dollar Highway)

Skyline Drive

Trail Damage (4wd)

Trails Offroad
(Scroll down past the Beta information.)

Unaweep Tabeguache

More Scenic and Historic Byways

Colorado Scenic and Historic Byways Virtual Guide

Colorado AvalancheIce Hockey

Colorado MammothBox/Indoor Lacrosse

Colorado RapidsSoccer

Colorado RockiesBaseball

Denver BroncosFootball

Denver NuggetsBasketball

Denver OutlawsField/Outdoor Lacrosse

Trains

Colorado has its fair share of trains still running which have historic significance and heck, the scenery's not bad either! Here's an overview map I'm putting together for personal use (and not just of Colorado trains).

Cripple Creek & Victor Narrow Gauge Railroad

Cumbres & Toltec Scenic Railroad

Durango & Silverton Narrow Gauge Railroad

Georgetown Loop Railroad

Leadville Colorado & Southern Railroad

Pikes Peak Cog Railway

Rio Grande La Veta Pass Route

Royal Gorge Route Railroad