Bandelier Winter Solstice Walks

By Barbara “Bo” Jensen

Bandelier National Monument near Los Alamos, New Mexico, may not be the first place you think of for fall aspen viewing.

Bandelier offers excellent access to ancient dwellings nestled against the walls of Frijoles Canyon in the Jemez Mountains. For over 10,000 years, people have inhabited this area, from nomadic Paleoindian hunter-gatherers to the Ancestral Pueblo people who from 1150 to 1550 CE built their villages from blocks of soft volcanic tuff. Placing horizontal rafters, called vigas, into holes carved in the rock walls, they were able to create multistory, multifamily housing, like a Long House with its cavate structures for storage.

As with many cliff dwellings in the Southwest, why this farming community left is unclear. Frijoles Creek still runs at the base of Alcove House — perched in a wide cave 140 feet above the stream) — and I saw fat squirrels gathering seeds nearby, and deer quietly grazing their way across the ruins of Tyuonyi, a three-story pueblo built in a freestanding ring-shape around a central courtyard.

Climate change has negatively impacted the aspen’s high-altitude ecosystem. Most of Bandelier sits below the 8,000-foot elevation of the aspen’s preferred habitat range. But up in the northwest corner of the park sits Cerro Grande, the “Grand Hill,” at 10,199 feet, anchoring Bandelier to the rim of Valles Caldera National Preserve next door. Drought-fueled wildfires in this area, notably the Cerro Grande Fire (2000) and Las Conchas Fire (2011), killed substantial numbers of mature aspen in Bandelier’s high country, but they haven’t lost entire clones yet, according to Kay Beeley of the National Park Service.

Kay let me know that earlier this summer she had heard about an outbreak of oystershell scale, new to New Mexico. It was found around Pajarito Ski Hill and on the west side of the caldera up San Antonio Creek, so she thinks it’s likely in Bandelier, “but no one has gone looking for it or reported it yet.”

That’s why I decided to go looking.

Arriving early at Cerro Grande Trailhead, the cool morning air echoed with the eerie, wavering calls of bull elk, their vocal challenges rising from the pine forest with the last of the dawn’s mist. Even though I’ve lived in elk country for more than 30 years, until now I have never heard them bugling in the morning, only at twilight, when their raging hormones bring them down from the hills to lock horns and battle for dominance over each other and the female herds.

As the trail rose, I listened to the elk’s high-pitched whistling voices ringing through the forest. They tend to crash their way heavily through the trees as they travel, so you can usually hear them nearby, and I kept my eyes and ears open. I walked past hillsides of tall, charred spikes of unidentifiable tree trunks standing next to green Ponderosa pines, their trunks blackened on one side, survivors of whichever fire took out their kin. New aspen had popped up like wildflowers on these cleared hills, even as their larger siblings stood lifeless within the burn scar. Often, I stepped off the trail to inspect their leaves, branches, and trunks, looking for the distinctive overlapping scales of the oystershells. Mostly I found elk scarring and thin shreds of bark or snapped twigs nibbled hastily and left hanging. On one tree, I noted distinctive parallel scratches from a bear’s claw — but no scale.

It was the same on the Alamo Boundary Trail and the Upper Frijoles Canyon Overlook Trail, all rich with young aspen growing up through stands of burned forest. Fire supports aspen regeneration, burning away competition for sunlight and soil nutrients. I marveled at the varied colors of the leaves, shimmering green, chartreuse, and gold in the sunlight. As the nights lengthen and the weather cools, the leaves’ green chlorophyll breaks down for the year, revealing yellowish carotenoids stored within the leaf cells, phytonutrients that help absorb sunlight for photosynthesis.

Here and there, rebel aspen trees blazed orange and red. Some aspen, responding to warm, sunny fall days and an excess of stored plant sugars, produce anthocyanins in the autumn, fiery red pigments that make the healthy trees appear to be burning anew beside their golden neighbors, eye-catching between the tall blackened stumps and standing evergreens.

As I walked the return loop from Upper Frijoles Canyon in the late afternoon, I stepped toward a young aspen grove and then suddenly jumped back. Something very large, screened by the stand of trees, had huffed loudly above my head, it’s voice ending with a squeaky, squealing wheeze. Then it wheeled and pounded away, crashing deeper into the forest.

I let out a sigh of relief. It’s breathtaking, and exhilarating, hiking in the New Mexico mountains in the autumn chill. Light snow began to fall as twilight settled over the high hills. For now, the aspen in Bandelier National Monument seem to be holding their own, colors burning brightly on the steep slopes, dodging invasive scale and surviving extreme drought, ongoing wildfires, and hungry elk.