It was the Fourth of July weekend, and we headed to the mountains, escaping Denver’s 95 degree heat. As we approached the summit above tree-line (trees can’t grow above a certain elevation; in Colorado that elevation is around 11,000 to 12,000 feet), it began to snow. Hard. And blow. Harder. We donned our wind pants and warm coats, hats and gloves, and continued to the top.

There we found a hiker who had passed us on the trail earlier in the day. He was dressed in running shorts and a light shirt, wearing tennis shoes (which were quite wet by now), and carrying a small, empty water bottle. He was shivering violently. People began bundling him up in their extra warm clothing, giving him food and water, and then helped him back down the trail.

Here are a few basic “rules” to remember before heading up that mountain trail (even when hiking up peaks lower than 14,000 feet):

1. Bring along extra layers of clothing. No matter how beautiful and warm the weather is when you start out, temperatures can plummet and you can get soaked if a thunderstorm moves in.

2. Thunderstorms are extremely common in Colorado’s mountains during summer afternoons. Plan your day so you can be leaving the summit and heading back down the trail no later than noon. Watch the sky for cloud build-up, and turn around earlier if a storm seems to be forming early.

3. Carry plenty of water, and drink frequently. Even in cool weather, you’ll probably need to drink a minimum of 2 quarts of water during your hike to and from the summit of one of the “easier” Fourteeners. That amount of water is on the low side for many people.

4. Some of the other “essentials” to bring along: food (snack frequently – don’t let yourself run out of “fuel”), map & compass (and know how to use them), fire starter, flashlight or headlamp, 1st Aid kit, sunglasses, and sunscreen.

5. Hike with a buddy. That cold, wet guy was lucky that other people came along to help him. Imagine what would have happened if he had been alone for another 30 minutes!