Nature Walk: Phil Hardberger Park – Geology Trail – CNC 2026

There's a stretch of trail tucked along Blanco Road in where the terrain shifts, the air cools, and things get interesting. A unique microclimate runs through the Geology Trail, and it's home to more life than most people realize.

Come find out what's been hiding in plain sight.

On Saturday, April 25, from 8–10 AM, join Robert Doyal and Tracey Burke, Texas Master Naturalists and iNaturalist Ambassadors, for a morning nature walk where we'll use the free iNaturalist app to spot, photograph, and identify whatever we find — plants, insects, birds, and the stuff you walk right past every day without noticing.

No experience needed. If you can point a phone camera at a bug, you're qualified.

This walk is part of the City Nature Challenge, a worldwide event where people in hundreds of cities spend four days discovering and documenting the wildlife around them. Everything you photograph becomes part of a global biodiversity dataset — and helps scientists better understand what lives right here across our 12-county San Antonio Metro Area. That beetle clinging to a piece of bark? That's data. The lichen creeping across the exposed rock? That's a contribution. You're not just going for a walk — you're mapping what lives here.

• Saturday, April 25 · 8:00–10:00 AM
• Phil Hardberger Park — Voelcker Homestead Trailhead (1021 Voelcker Lane)
• Easy walking
• Registration is required — please RSVP through Eventbrite to save your spot.

Download the iNaturalist app and create a free account — it takes about a minute and means we can start exploring right away.

• Please arrive by 7:45 AM
• Bring water and sunscreen
• Wear closed-toed shoes and dress for the weather
• Great for adults and older kids (14+)
• Please leave pets at home
• Park at the Voelcker Homestead Trailhead lot

This event is entirely outside and will be cancelled if there is inclement weather or unsafe conditions. If that happens, we'll notify everyone registered through Eventbrite via email.

Find more City Nature Challenge events happening across the San Antonio Metro Area, a 12-county region, at CNC-SA.org

Know what’s Happening Next — before everyone else does.

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Host or Publisher Robert Doyal