Sun shading (lidar)

Adjust simulated sun direction on the lidar hillshade. Azimuth = compass bearing of the light (0° north, 90° east). Altitude = height above the horizon (low = long shadows).

Historical map overlays

USGS scanned historical topographic maps. Enable an overlay and adjust its opacity. Works in 2D and 3D.

Sun azimuth: 315°   Sun altitude: 45°   Z factor: 1   Lidar opacity: 1
center: —   mouse: —   zoom:

BLANCO SHOALS NATURAL AREA

Water Locations TX • HAYS County County
Coordinates: 29.8890, -97.9290
Elevation: 0 ft
Description
Natural swimming and wading access on the Blanco River in HAYS County, Texas.
Historical Notes
San Marcos , Hays County. 81-ac undeveloped riparian preserve along Blanco River, just E of I-35. Features include gravel bars, shaded banks, high bluffs, and seasonal pools. No formal trails, restrooms, or amenities—just raw river and solitude. Best for wading, birdwatching, and hammock lounging. No lifeguards. Entry: free. Open daily, dawn to dusk. GPS: 29.8890° N, 97.9290° W. Map . FMI: San Marcos Greenbelt Alliance: smgreenbelt.org Listed in Cofran's Texas Hill Country Portal — Swimming Holes. Water depth and access vary with drought and flood conditions; most sites have no lifeguards.
Status / Verification active — Legendary or approximate

Take Add Data / Take Notes

Log in or create an account to save private field notes for this location. Your notes are only visible to you.

Forgot password?

Enter your email and we'll send you a link to reset your password.

Back to log in