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From The Map To You

Old Tunnel State Park

On my mission to document all of the Texas State Parks I found myself driving a very twisty and winding hill country roads in my bog ole motor home while towing my F150 pick up.

Old Tunnel State Park — Dude RV field still

Trail Notes

What we noticed on the ground

On my mission to document all of the Texas State Parks I found myself driving a very twisty and winding hill country roads in my bog ole motor home while towing my F150 pick up. Just know if you are planning on visiting Old Tunnel State Park I do not recommend traveling those winding hill country roads with your wife in your motor home while you are towing your pick up. Old Tunnel State Park is day use only with only a handful of picnic tables and only one short hiking trail. What really makes Old Tunnel State Park so interesting and unique are the bats, so very many bats! The city of Fredericksburg Texas built a railway to improve commerce, that required digging a tunnel, after the railroad was shut down in the 1940s the bats moved in. The state of Texas took over the property to protect the bat colony and created a very unique place for the public to view the nightly feeding departure. Join me as I explore the very unique Old Tunnel State Park.

Mapped with our Texas State Parks stops.

Living guide

What the weather is usually like at Old Tunnel State Park

NOAA's 1991-2020 climate normals for the Fredericksburg, TX weather station, 10.9 miles from Old Tunnel State Park, show that the warmest month is August (average high 94.2 F) and the coolest is January (average low 34.2 F).

May is usually the wettest month, at about 4.26 inches of rain, and January the driest, at about 1.56 inches. The monthly figures add up to about 30.6 inches in a typical year.

Average high, average low and rain by month (1991-2020 normals)
MonthHigh (F)Low (F)Rain (in)
January59.834.21.56
February63.838.51.84
March70.745.92.50
April78.053.22.55
May84.062.54.26
June90.368.52.98
July93.470.71.88
August94.270.22.42
September87.964.13.25
October79.154.23.10
November68.243.92.18
December61.435.82.04

Source: NOAA NCEI U.S. Climate Normals 1991-2020 (monthly), station Fredericksburg, TX (USC00413329), 10.9 miles from the park. Station elevation about 1685 ft; the map pin is at about 1907 ft (USGS). Data retrieved 2026-10-02.

See today's forecast for Old Tunnel State Park (National Weather Service)

Know Before YOU Go

Here’s what I’d tell you before you roll in

  • Typecampground
  • GPS30.1011507, -98.8207823

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Old Tunnel State Park

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