Alton Military Prison Site Overview
Community Reviews
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Alton Military Prison Site
The Alton Military Prison was a prison located in Alton, Illinois, built in 1833 as the first state penitentiary in Illinois and closed in 1857. During the American Civil War, the prison was reopened in 1862 to accommodate the growing population of Confederate prisoners of war and ceased to be prison at the end of the war in 1865. The prison building was demolished not long after the Civil War. (Source: Wikipedia, CC BY-SA)
Plan your visit down to the hour
Same weather feed Snoflo's iOS app uses -- updated continuously from NOAA / yr.no.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Plan a longer trip
The closest parks, campgrounds, fishing spots, and other landmarks so a quick visit can grow into a full day.
Responsible visitation & Leave No Trace
- Know before you go
- Check the operator's site (BLM, NPS, state agency, or private owner) for access rules, permits, and seasonal closures before driving out.
- Stay on trail
- Many points of interest sit in fragile ecosystems. Stick to marked paths to protect vegetation and prevent erosion.
- Respect wildlife
- Observe from a distance, never feed wildlife, and give nesting birds and denning mammals plenty of space.
- Pack it in, pack it out
- Take all trash, food scraps, and gear back with you. Remote sites often have no trash service.
- Leave what you find
- Don't take rocks, plants, fossils, or artifacts. Federal law protects cultural and natural resources on public land.
Set push alerts in the Snoflo app
Save Alton Military Prison Site as a favorite, set a weather threshold (precipitation, freezing temperatures), and the iOS app will push the moment conditions cross.
About Alton Military Prison Site
What is Alton Military Prison Site?
A point of interest in Illinois tracked by Snoflo -- typically a scenic landmark, named summit, monument, or viewpoint.
How fresh is the weather data?
The hourly forecast updates throughout the day from NOAA / yr.no public feeds.
When is the best time to visit?
Use the 15-day temperature & precipitation outlook on this page to pick a window with comfortable temperatures and low precipitation.
How do I get there?
Tap Directions in the hero above for Google Maps driving directions, or Open in map to center the Snoflo interactive map on the spot.
Can I get alerts when conditions change?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this POI, set a threshold (temperature, precipitation), and you'll get a push the moment it crosses.
Other points of interest near here
Snoflo-tracked landmarks within driving distance of Alton Military Prison Site.