The Peavine Trail: A Railroad Grade Along Watson Lake

The Peavine is a railroad, or it was. The Santa Fe, Prescott and Phoenix line ran through the Granite Dells from the 1890s, and when the rails came up the grade stayed. What is left is five and a half miles of nearly level crushed rock running along the east side of Watson Lake, through the middle of the boulder field, on an alignment no trail builder would ever have been allowed to survey.

The trail at a glance

Go two miles and turn around

The full eleven-mile round trip is a commitment and the back half is open country with far less to look at. The first two miles are the reason to come. The grade runs straight into the Granite Dells, and the railroad simply cut through the boulders rather than going around them, so you walk through slots with rock standing forty feet either side and the lake appearing between them.

Turn around at the Iron King junction and you have a four-mile walk with no climb in it, which is the version most people want.

Why it is flat, and why that matters

Steam locomotives cannot climb. A grade of more than about two percent was a serious engineering problem, so the surveyors followed contours and blasted through anything in the way. That constraint is why the Peavine is the only long trail near Prescott that a person with bad knees, a jogging stroller or a road-ish bike can use end to end.

It is also why it connects. The Iron King Trail picks up from the same alignment and runs on toward Prescott Valley, which is a separate town eight miles away and routinely confused with Prescott itself. That distinction is worth knowing before you book anything, and it is laid out in Prescott vs Prescott Valley.

Parking and the fee

The Watson Woods trailhead off Sundog Ranch Road is the usual start. The City of Prescott charges $5 per vehicle, free on Wednesdays, and the same pass covers Watson Lake, Willow Lake, Goldwater Lake and the Constellation Trails. The city sells 10-visit, 40-visit and unlimited annual passes if you are here for a while.

Note this is the city scheme, not the Forest Service one. Both charge $5 and both are free on Wednesdays, but the passes are not interchangeable. Every fee in the area is collected in one table in what a Prescott trip costs.

When to go

Morning, in summer. The Dells are rock and they hold heat all afternoon. In autumn the cottonwoods in Watson Woods turn and it is the best few weeks of the year on this trail. In winter it stays walkable when the higher trails are under snow, which makes it the reliable option from a Groom Creek cabin in January.

For the shorter, more scrambly way into the same rock, see the Constellation Trails. For everything else within reach, the best hikes around Prescott compares ten.