Several species of reptiles and amphibians may be observed while riding up Lookout Mountain (see list). Their populations crashed during the winter of 2006-2007. They are slowly recovering as of 2020. Unfortunately, most reptiles have a bad habit of warming up on the road when temperatures drop. The unfortunate result is that most observed reptiles are those killed by vehicles.
Spotted salamanders were occasionally seen near Lariat Spring prior to the population crash. They have not been observed there since. The larval form, also known as mud puppies, still exist in the Golden Reservoir water supply at the top of Lookout.
There are reports of people seeing poisonous coral snakes on Lookout. Coral snakes do not occur in Colorado. These are harmless milk snakes that have patterned color bands similar to coral snakes. Curiously, milk snakes are frequently seen dead but very rarely seen alive.
Prairie rattlesnakes are occasionally seen sunning on the road. Please leave them alone and they won’t bother you. They are beneficial and important predators and a natural part of the foothills ecosystem. There are always reports of large rattlesnakes being seen. They are likely harmless bullsnakes and protected by law in Colorado. Bullsnakes may perform a pretty good imitation of a rattlesnake when aroused. According to Colorado Parks and Wildlife, adult rattlesnakes average only about 28 inches in length.