Arenas Negras Loop

Overview

A short, dramatic tour of Teide’s volcanic heart. This signed loop circles Montaña del Cerrillar from the El Portillo Visitor Center and delivers classic “black lands,” pumice slopes, and sweeping caldera vistas in a compact package. Expect roughly 5.0 miles total (typical GPS tracks), though the official figure lists 6 km; plan on 2.5–3 hours either way. Difficulty is generally low with one very steep section.

What You’ll See

The ascent weaves through pumice dotted with broom, opening big looks over the Llano de Maja. From high points around Cerrillar you can watch the trade‑wind “sea of clouds” spilling over the Orotava Valley; on clear days, distant La Palma and the Izaña observatory may pop into view. The descent traces the inner wall of the Las Cañadas caldera past the stark Arenas Negras cinder cones—jet‑black lapilli underfoot, vegetation sparse, geology front and center.

Route Notes

Start and finish at El Portillo Visitor Center. Follow the loop around Montaña del Cerrillar, then descend past the Arenas Negras and Picón cones to briefly join Trail No. 4 (Siete Cañadas) back toward El Portillo. The route connects with Trails 1, 4, and 37 and the GR‑131, so stay alert at junctions. Reviewers often prefer hiking counter‑clockwise for the best unfolding views.

Difficulty and Hazards

It’s a mostly easy walk, but one descent ramp is very steep (slopes up to about 60%) and on loose cinders—take it slowly and mind your footing. The loop is exposed to sun and wind with little shade; weather can swing quickly at altitude. The path is signed and generally easy to follow, but bring a map/track to avoid straying off the main route.

Flora, Fauna, and Geology

You’re walking a textbook cross‑section of Teide volcanism: pumice blankets on the ascent, scoria around the cones, and layered caldera walls. Common plants include broom, codeso, summit rose, and pajonera grass. In flatter stretches, keep an eye out for chiffchaffs, kestrels, and pipits riding the thermals.

Best Time to Hike

This loop goes most of the year. Because it’s exposed, earlier starts are smarter for cooler temps, softer light, and calmer winds. A seasonal bonus: along the brief section on Trail No. 4, spiny bugloss often blooms around June, adding a splash of color to the black landscape.

Tips

Bring sun protection, layers for rapid temperature changes, sturdy footwear with good traction, and plenty of water. Follow posted signs, and resist shortcuts on fragile cinder slopes.