Mallory Cave

Distance: 3.2 miles round trip
Elevation: 6,109 ft - 6,817 ft
Elevation Gain: 934 ft (cumulative)
Bathroom at Trailhead: Inside NCAR
Dogs: On leash until after the water tank then off leash with Boulder green tag
Date Hiked: 2 August 2014
Tags: #Boulder, #hiking, #NCAR

Looking down on Boulder from the Mallory Cave Trail

The short but steep trail to Mallory Cave behind NCAR in Boulder is a great way to burn a few calories and still get home in time to binge watch Games of Thrones with a bucket of chicken wings.

NCAR's parking lot. These cars are for Saturday hikers. 

Walking up the NCAR mesa

The trail starts at NCAR, the big pink castle on the hill up Table Mesa Drive in south Boulder. Park anywhere in the large lot and head around the back side of the building from the north side.

The first 0.6 miles takes you across the mesa upon which NCAR resides, down a steep embankment and up a hogback to a large water tank. The hogback segment includes 239 ft of elevation gain in less than 100 yards. I used to torture new arrivals by having them tell me their life story on this pitch while I rushed us uphill like we were being chased by IRS auditors.

The steep trail down off the mesa

How green the hills! 2014 has been so rainy that the foothills have stayed green well into September!

After the water tank, the route then walks out onto another ridge with stunning views of the Flatirons. At 0.7 miles is a trail junction. Take a left here and travel down to the Mesa Trail and the junction with the Mallory Cave Trail (at 0.8 miles). A large kiosk marks the spot. To get to the trail, you might have to dodge all the trail runners whizzing past on the Mesa trail, which parallels the Flatirons for 3 miles in either direction.

Past the water tower and heading towards the Mesa Trail

Either route at the junction ahead will take you to the Mesa Trail. I usually go left when going to Mallory Cave.

From this point on, the trail gets progressively rockier as it climbs an additional 280 ft to the base of a 2-story wall of angled rock (at 1.3 miles). Poison Ivy grows in profusion along this segment, so refrain from the urge to "roll in the hay" or you may come home with a itch you can't scratch.

Looking back at the junction of the Mesa Trail and the Mallory Cave Trail. A large sign marks the spot. 

Heading up the Mallory Cave Trail. We will get up close and personal to the flatiron in the distance. 

The trail turns sharply here and heads straight up in a long series of steps that weave in and out of Boulders. Several climbing areas are marked by signs and corresponding splinter social trails, which can easily lead the breathless hiker astray. This is particularly true coming down.

The Mallory Cave trail is one of the wettist ones in Boulder as indicated by these ferns along the route. 

There are trail signs for Mallory Cave AND local climbing spots. Be sure to read them or you'll get off route. 

Just before the top is a large boulder field with stunning views of the surrounding area. A little further on, the trail deadends at a rock wall (at 1.6 miles and 769 ft of elevation gain). A small interpretive sign describes the bats that live in the cave, which is 200 ft rock climb. The cave is now totally closed to protect the bats, so you might as well turn around and either linger at the boulder field or and race back down to the DVR.

Open area near the top of the trail

Up this wall is the entrance to the cave. It is closed off now. I have never had the nerve to climb up there. 

If you hike to Mallory Cave midweek like I used to do, you will probably be alone on the trail. On weekends, there will be hordes of climbers gleefully hanging off of the porous rock until their fingers bleed. On this trip, which was after Colorado legalized marijuana, there was at least one climber who obviously believed that nirvana could be chemically induced. I guess for rock climbers, "stoned" has many definitions.

NCAR/Mesa Trail to Kohler Mesa

Distance: 5 miles round trip
Elevation: 5,120ft - 6,250ft
Elevation Gain: 1,237 ft (cumulative)
Dogs: Off leash in designated area with Boulder green tag
Bathroom at trailhead:  Inside NCAR
Tags: #OSMP, #boulder, #hiking, #coloradooutdoors

A hike from NCAR to the Mesa Trail and beyond takes you along the scenic Flatirons.

Nestled next to the Flatirons in Boulder, CO is warren of trails that can be combined in all sort of ways. This post describes a out and back that starts at NCAR, the big pink castle on the hill, and travels the Mesa Trail south down to Kohler Mesa. Most of the trails along this route are owned by Boulder but part of them belong NOAA. For those who want to bring their dogs, leash restrictions vary and you'll be putting your dog on and off leash.

Map of the route. The red circle is the water tank. The red square is the picnic table at the end of the route.

The first 0.2 miles of trail is an interpretive trail behind NCAR. 

The towering 3rd Flatiron from the trail behind NCAR. 

Any outing in Boulder that starts from NCAR has one major advantage. You'll never run out of parking! As Boulder continues to grow, parking at various trailheads continues to be a problem. Most fill up by 8am and have a parking fee for non-residents to boot! NCAR has hundreds of parking spots, and while the ones closest to the trailhead will be full, you can always find a spot.

Heading down the south side of the mesa NCAR sits on

Turn right at this junction and it will connect to the Mesa Trail going north

The route begins on the north side of NCAR and follows an interpretive trail for 0.2 miles before heading down the south side of the hill. The trail then travels down and around and then up the steep slope of a hogback to a large green water tank. The Mesa Trail is located on the backside of the hogback, down another series of trails with million dollar views of the Flatirons.

On the Mesa Trail heading south

Snow and Ice can collect in this gully in winter

On the west side of NCAR, the Mesa Trail weaves up and down to the junction of the Kohler Mesa Trail at 1.4 miles. It is a short 1 mile across Kohler Mesa to the NOAA trailers and a picnic table on the right. From this vantage you are gazing across the plains. The NOAA complex is just below with the University of Colorado nearby.

Heading up the north side of the gully

Further along the Mesa Trail

For the return, you can retrace your sets or descend off of Kohler Mesa to the Skunk Canyon Trail (see map), which parallels Kohler Mesa at the bottom of Skunk Canyon. Head west on this trail and it will eventually climb back up to the Mesa Trail.

Ponderosa Country

On the eastern end of Kohler Mesa. The gate ahead marks the boundary with NOAA property.

Trailers on NOAA's property