Mount Bierstadt

What to Expect

Crowds

Bierstadt is one of the 3 most-climbed 14ers in Colorado. On a summer weekend, you will share the trail with hundreds of other hikers. The parking lots fill early, the trail is crowded from the boardwalk to the summit, and there will be a line at the boulder section near the top.

If crowds bother you, go on a weekday. Tuesday and Wednesday see a fraction of the weekend traffic, and you might have the summit to yourself.

Weather

Afternoon thunderstorms are the biggest objective hazard on Bierstadt. Lightning above treeline kills people every year in Colorado, so treat the timing below as a requirement.

Plan to start hiking by 5:30 to 6:00 a.m. and summit by noon at the latest. Storms typically build between noon and 2 p.m. in summer. If you see dark clouds or hear thunder, descend immediately. The ridge crest and summit are the worst places to be in a lightning storm.

Morning conditions are usually calm and clear. Temperatures at the trailhead hover around 35 to 45 degrees at dawn in summer and can be 10 to 15 degrees colder on the summit with wind chill.

Altitude

You start at nearly 12,000 feet and top out above 14,000 feet. If you live at sea level or even at Denver's 5,280 feet, you will feel the altitude. Symptoms include shortness of breath, headache, nausea, and fatigue.

Spend at least one night above 7,000 feet before your climb if possible. Drink extra water the day before. On the trail, go slower than you think you should. If you develop a severe headache, persistent nausea, or confusion, turn around. Altitude sickness is real and it gets worse as you go higher.

Gear Essentials

You do not need specialized climbing equipment for the West Slopes route in summer. You do need the items below.

• Hiking boots with ankle support. The boulder field demands sturdy footwear. Trail runners are fine for the lower trail but leave your ankles exposed on the summit block.
• Trekking poles. They are worth their weight for the creek crossing, the steep sections, and especially the descent. Your knees will thank you.
• Layers. Bring a moisture-wicking base layer, an insulating mid layer (fleece or light puffy), and a waterproof shell. Temperatures can swing 30 degrees between the trailhead at dawn and the summit at midday.
• Rain jacket. A rain jacket is non-negotiable, even when the forecast is clear, because mountain weather changes fast.
• Sun protection. Pack sunscreen, sunglasses, and a hat. UV intensity is extreme above 12,000 feet. You will burn in 20 minutes without protection.
• Water. Carry at least 2 liters, and more if it is hot or you are a heavy sweater. There is no reliable water source on the upper route.
• Food. Pack high-calorie snacks you can eat on the move, such as trail mix, energy bars, or a sandwich. You are burning 500 to 700 calories per hour on the climb.
• Headlamp. If you start before sunrise, you need one. Bring it even if you think you will not need it.
• Bug spray. You will want it in the willows in June and July. Trust me.

Mount Evans Wilderness Regulations

Bierstadt sits within the Mount Evans Wilderness. Know the rules before you go.

• Wilderness permit: The Forest Service requires a free permit for the Mount Evans Wilderness, and you fill it out yourself.
• Group size limit: Parties are limited to 15 people, so a larger group needs to split up.
• Dogs: Dogs are allowed but must be on leash at all times. The leash rule is enforced, and it protects wildlife and other hikers. Clean up after your dog, bring extra water for it, and make sure it is in good enough shape for a 14er before you bring it along.
• Leave No Trace: Pack out everything you carry in. Stay on established trails to protect alpine tundra. Do not build cairns or rock art.

Common Mistakes

Starting too late: A late start is the most dangerous mistake and the most common. People roll into the parking lot at 8 or 9 a.m. and then act surprised when they are on the summit at 1 p.m. with thunderstorms rolling in. Start early every time.

Underestimating the descent: The hike back includes that 135-foot climb out of the willows on legs that have already hiked 7 miles at altitude. Budget time and energy for the return trip.

Skipping the weather check: Check the forecast the night before and again at the trailhead. The National Weather Service point forecast for Guanella Pass is the most reliable source. If storms are expected before noon, pick a different day.

Wearing cotton: Cotton absorbs sweat and rain, loses all insulating ability when wet, and takes forever to dry. Wear synthetic or merino wool for everything, including your base layer and socks.

Not eating or drinking enough: At altitude, your body burns more calories and dehydrates faster. If you wait until you feel thirsty or hungry, you are already behind. Eat and drink small amounts throughout the hike.

Ignoring the boulder field: The Class 2 section is short, but it demands your attention. People fall here every year because they rush through it or do not pick good foot placements. Slow down, use your hands, and watch where you step.

Parking lot panic: Some people arrive to a full lot and park illegally on the road. You will get a ticket, and you might get towed. A full lot means you waited too long, so drive back down and come back another day, ideally a weekday.