Updated
Vermilion River Reservation: Mill Hollow
Park · Vermilion, Ohio
Cold water — serious cold-shock risk today
Cold waterCold water — serious cold-shock risk today: water temperature is 36°F, cold enough to cause cold-water shock on sudden immersion.
- Water temp 36°F (2°C)
- Streamflow 9 ft³/s
- Gage height 2.03 ft
Live, provisional data from USGS gauge Vermilion River near Vermilion OH (0.1 mi away), as of Oct 29, 6:00 AM gauge-local time.
Why, sources & official advisories
- Water temperature is 36°F, cold enough to cause cold-water shock on sudden immersion. — USGS gauge 04199500, as of Oct 29, 6:00 AM gauge-local time
- Flow is within the normal range (25th–75th percentile) for Oct 29 (median 19 ft³/s over 56 years). — USGS daily streamflow statistics, as of Oct 29, 6:00 AM gauge-local time
No official beach-advisory feed for Ohio yet — follow posted signs and local guidance.
Get an email when it’s warm enough
It’s 36°F at Vermilion River Reservation: Mill Hollow now. We check the water daily and email you once when it reaches your temperature.
Vast park with tree-shaded trails, water access, a settler's cabin with exhibits & a concert stage.
What’s swimming here?
Fish recorded within 2 km: Spotfin Shiner, Common Carp, Bluegill and 2 more species.
5 fish species in 5 public records within 2 km of Vermilion River Reservation: Mill Hollow since 2000.
- Spotfin Shiner Cyprinella spiloptera1 record · 2026
- 1 record · 2021
- Bluegill Lepomis macrochirus1 record · 2020
- Golden Shiner Notemigonus crysoleucas1 record · 2020
- 1 record · 2003
Non-native: the USGS Nonindigenous Aquatic Species database lists the species as introduced to the Huron-Vermilion watershed.
Caught one? Make it a card.Snap your catch in Reelio and collect every species. Free on iPhone.Data: GBIF.org occurrence records, CC0 and CC BY only (iNaturalist research-grade observations, GBIF dataset). Common names: USGS NAS; GBIF.org (The IUCN Red List of Threatened Species). Non-native flags: USGS NAS. These are sightings and specimens people reported, not a survey: a fish missing from the list may still live here.
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Frequently asked questions
- Where is Vermilion River Reservation: Mill Hollow?
- Vermilion River Reservation: Mill Hollow is a park in Vermilion, Ohio.
- What is the water temperature at Vermilion River Reservation: Mill Hollow?
- As of October 29, 2026, the water temperature at Vermilion River Reservation: Mill Hollow in Vermilion, Ohio is 36°F (2°C), measured by USGS gauge 04199500, 0.1 miles away.
- Can you swim at Vermilion River Reservation: Mill Hollow?
- Cold water — serious cold-shock risk today: water temperature is 36°F, cold enough to cause cold-water shock on sudden immersion. Checked October 29, 2026.
- How is Vermilion River Reservation: Mill Hollow rated?
- Vermilion River Reservation: Mill Hollow in Vermilion, Ohio has an average visitor rating of 4.8 out of 5, based on 1505 reviews.
- What amenities does Vermilion River Reservation: Mill Hollow have?
- Visitor-listed amenities at Vermilion River Reservation: Mill Hollow include camping-nearby.
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Location & Contact
💡 Best times & visiting tips
- ›Weekday mornings (8–10 AM) are typically less crowded
- ›Check the forecast 2–3 days ahead for best planning
- ›Avoid holiday weekends for a quieter experience
Features & amenities
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