When ONX Wines took on the Kiler Canyon Vineyard in 2017, the old vines were infected with virus and the steep Willow Creek slopes were as much liability as promise. Winemaker Drew Nenow looked at the depleted limestone, the punishing grade, and the wind that pours through the Templeton Gap, and saw a site that would make vines struggle in exactly the right way. The replant took nearly eight years. The patience showed in the first release in 2025, a micro-lot label drawn from a place that asks more of a vine than almost anywhere on the Paso west side.

A vineyard worth eight years

Kiler Canyon Vineyard belongs to ONX Wines, the label the Olson family built in Paso Robles after they began acquiring land here in 2004. When they took on the Kiler Canyon site in the Willow Creek District in 2017, the existing vines carried virus and had to come out. Rather than rush a replant, the team rebuilt the vineyard slowly, matching clones and rootstocks to a brutal, rocky site, a process that ran nearly eight years before the wines debuted in 2025.

The man behind them is Drew Nenow, a second-generation winemaker raised around Napa Valley and the family’s Behrens cellars, with an enology degree from Cal Poly San Luis Obispo and early training at Turley Wine Cellars under Ehren Jordan and Tegan Passalacqua. He joined ONX in 2013 as a harvest intern, rose to head winemaker by 2019, and now leads winegrowing across both ONX and Kiler Canyon. Kiler Canyon is his micro-lot project, a vineyard-first label where the site does the talking.

Only about 24 of the vineyard’s 62 acres are planted, on limestone so depleted and slopes so steep that the vines have no choice but to dig deep and yield almost nothing.

Steep, depleted, wind-stressed limestone

Kiler Canyon sits in the Willow Creek District, the limestone heart of the Paso Robles west side, where high bedrock slopes and calcareous Monterey Formation soils define the cool, Region II climate. Of the vineyard’s 62 acres, only about 24 are planted, and the ground is extreme even by west-side standards, steep grades over depleted limestone that forces roots deep in search of water and nutrients. The vines fight, and the fight concentrates the fruit.

The other force here is the Templeton Gap. Marine air and strong afternoon wind funnel through the gap and stress the canopy, which keeps yields low and drives a wide day-to-night temperature swing. That cooling lets the fruit ripen fully in the daytime sun while cold nights preserve acidity, so the wines come in deeply ripe yet bright, with low pH and the chalky, fine-grained tannin that limestone tends to give. The vineyard is farmed sustainably and moving toward organic certification, with Grenache planned to round out the Rhone lineup.

Micro-lots that taste like the slope

The Kiler Canyon range is small and Rhone-focused, built on Syrah, Mourvedre, and Roussanne. The 2021 Estate Syrah earned 95 points from Wine Enthusiast, a dark, structured wine with blackberry, smoked meat, violet, and the chalky tannin that marks fruit grown on depleted limestone. The Cuvee is a Syrah and Mourvedre blend, the Mourvedre adding game and earth and a wilder, savory edge to the Syrah’s core.

On the white side, the 2023 Roussanne was limited to just 30 cases and earned 94 points from James Suckling, a textural, low-yield white with honeysuckle, pear, and a saline, stony cut that comes straight from the rock. Across the lineup the house signature is consistent, fruit-forward concentration framed by chalky tannin and bright acidity, the unmistakable fingerprint of a steep limestone site that makes vines struggle for everything they give.

What to pour Kiler Canyon with

The Estate Syrah is built for fire. Red-oak-grilled tri-tip or lamb is the move, because the wine’s firm, chalky tannin binds to the protein and fat in a charred, marbled cut, softening the tannin and enriching the meat in the same bite. A peppercorn crust or a smear of romesco picks up the Syrah’s own savory, smoky notes. The Cuvee, with Mourvedre in the blend, leans even more toward game, so think grilled duck or a wild-mushroom dish where earthy umami meets the wine’s savory depth.

The Roussanne is the surprise. Its weight and saline cut make it a natural for richer seafood and roasted vegetables, where its acidity cuts the richness and resets the palate, a perfect partner for the kind of small, savory tapas the winery pours alongside it. Keep chili heat in check across the reds, since heat amplifies alcohol in these concentrated wines. To match a specific Kiler Canyon bottle to your table, our wine pairing generator will find the fit.

Visiting Kiler Canyon

Kiler Canyon pours at a tasting lounge in Tin City in Paso Robles, set among redwoods across from sister winery ONX, where guided flights of the Rhone wines come with a generous selection of wine-friendly tapas curated from local, organic ingredients. The winery also offers small-group, off-road tours of the steep Willow Creek estate vineyard for those who want to see where the fruit comes from. Both experiences run by reservation, so book directly through the winery and confirm current days, hours, and fees when you reserve. For the bigger picture of how the Willow Creek District fits the rest of the appellation, our Paso Robles guide maps the west side and beyond.

Kiler Canyon Vineyard: common questions