If you’re looking for a short but rewarding off-road adventure with a heavy dose of mining history and killer panoramic views, the Grey Horse Mine Trail just north of Kearny, AZ should be on your list. Melissa and I ran it in mid-September 2025 and came away seriously impressed.

Trail Ratings (as of September 2025)

• Main loop: 2.0 – well-maintained gravel and dirt, suitable for any stock high-clearance 4WD.
• Mine branches (upper spurs): 2.5 – a little narrower and rockier in spots, but still very doable.
• North Fork spur: Brushy! Expect a solid helping of pinstripes if your Jeep is wider than about 74″. If you really hate scratches, toss a pair of pruning shears or loppers in the rig and knock back the worst of the gamble oak and serviceberry on the way in.
• South Fork spur: Wide open, smooth, and fast – stays right around a solid 2.0 the whole way.

The Views

Even with the short overall mileage, the scenery punches way above its weight class. Once you climb out of the valley bottom, the trail pops onto ridges with 360-degree views of the surrounding rocky mountains pushing up from the desert floor. Late afternoon light in September was absolutely stunning; we probably stopped a dozen times just to stare and take photos.

Wildlife Bonus

We spotted a chunky little horny toad sunning itself on a rock, a red-tailed hawk resting atop a tall saguaro, and a committee of turkey vultures circling lazily. Plenty of smaller birds flitted around the brushy vegetation too. Always fun to see desert life doing its thing.

The Real Draw: Exploring the Mines

Let’s be honest; most people come here for the old mining remnants, and Grey Horse does not disappoint. There are multiple adits and shafts you can actually walk into (bring good lights and watch your step; standard mine safety rules apply). The rock faces are plastered with sparkling calcite crystals in places; it’s like nature’s glitter bomb went off.

Scattered around the hillsides you’ll find:

• Stone foundations from long-gone buildings
• Old concrete water tanks buried in the earth
• Remnants of bridge pilings crossing washes
• Rusted hardware and even an old steel ladder still leaning on the side of one shaft

It’s the kind of place where you can almost hear the echoes of pickaxes and ore carts from a century ago.

Final Takeaway

Grey Horse Mine Trail is the perfect half-day adventure when you want big views, a little bit of history, and the chance to poke around actual mine workings without committing to an all-day expedition. Just decide ahead of time if you’re taking the “pristine paint” North Fork route or the “who cares about a few scratches” South Fork route.

Either way, bring a camera, good boots, plenty of water, and a sense of wonder. You’re going to need all of them.

Happy Jeeping!

Link to trail review and .gpx trail information here.