Texas trails · Arroyo Primero
Arroyo Primero
A 4.8-mile network in Texas, with 875 ft of climbing. Reaches Trough Spring. Managed by the state.
Elevation profile
The climbing leans toward the final third: 52% of the ascent falls between mile 3.2 and mile 4.8. It climbs almost continuously, with little descent to recover on.
3-D terrain
USGS 3DEP ELEVATION × ESRI WORLD IMAGERY · VERTICAL ×1.5
Reaches
- Trough Spring (spring)
Heads up
Getting there
Arroyo Primero access. 29.37732, -103.90888 · directions
Daylight at the trailhead
On August 31, 2026 — the day this page was generated — first light reaches this trailhead at 7:08 a.m., the sun rises at 7:32 a.m. and sets at 8:18 p.m., and the last usable light fades about 8:43 p.m. (CDT) — 12 h 46 min of daylight. At about 2.7 mph plus 30 minutes per 1,000 feet of climbing, the 4.8-mile route takes roughly 2 h 13 min, so leaving the trailhead at sunrise puts you back around 9:45 a.m. — 10 h 34 min before sunset.
Loop options
- Arroyo Primero — 9.6 mi loop, 1,415 ft gain
Nearby trails
- Chorro Vista Trails — 1.8 mi
- Rancherias Loop — 7.0 mi
- Mesa De Anguila — 11.8 mi