Natural swimming hole

Castroville Regional Park

River · Texas

About this swimming hole

A large Alsatian-town park on the banks of the tree-lined Medina River west of San Antonio. The city's own park rules allow wading and swimming in the river at your own risk, and the shady, slow-moving stretches are ideal for a lazy dip.

Good to know

Water typeRiver
Depthwading to swimming depth
Best seasonMay-September
FeesFree
Reservations requiredNo
Hours5am-10pm (summer)
ParkingLarge lots off Alsace Avenue
Amenitiesrestrooms, picnic tables, trails, playground, campsites
CountyMedina County
Nearest townCastroville
Safety notesNo lifeguards in the river; swim at own risk per city rules

Map

Official information

Official park / agency page ↗ — check current conditions, fees, and reservations here before you go.

Nearby swimming holes

Frequently asked questions

Can you swim in Castroville Regional Park?

Yes — Castroville Regional Park is listed as a natural swimming spot in Texas. Heads-up: No lifeguards in the river; swim at own risk per city rules. There are rarely lifeguards at natural swimming holes — verify conditions locally before you go.

Does Castroville Regional Park require reservations?

No reservations are required at Castroville Regional Park based on current information — but verify before you go.

Is there a fee to visit Castroville Regional Park?

Reported fee info: Free. Fees can change — confirm with the official link.

When is the best time to visit Castroville Regional Park?

The best season is typically May-September.

Keep exploring

Verify before you go. Conditions, fees, reservations, and access can change — confirm details with the official link before visiting. Last verified: September 2026