Mark Decker Platform
Mark Decker Platform sits at 433 feet along the Great River Road, with the terrain dropping 14 feet over the next 600 meters. To the north, Batchtown State Fish and Waterfowl Management Area lies 2.7 miles out at 437 feet, with Titus Hollow Public Access Area another mile beyond at 3.4 miles and 439 feet. Jim Crow Island is visible to the north-northwest at 4.2 miles and 436 feet. Indian Hill rises to the south-southeast at 4.5 miles, reaching 611 feet. O'Fallon is 14.7 miles south, Saint Charles is 18.7 miles southeast, and Saint Louis is 37.4 miles southeast. Sunrise and sunset shift across the year, from a 5:38 a.m. sunrise and 8:33 p.m. sunset at the June solstice to a 7:19 a.m. sunrise and 4:44 p.m. sunset at the December solstice, with the equinoxes falling near 7:00 a.m. and 7:00 p.m. This platform follows the Observation Deck and precedes the Lowest Point in Illinois along the route.





What you’re looking at
Named terrain around this overlook, nearest first. No view direction is recorded, so every bearing is listed.
- Batchtown State Fish and Waterfowl Management Area437 ftnorth · 2.7 mi
- Titus Hollow Public Access Area439 ftnorth · 3.4 mi
- Jim Crow Island436 ftnorth-northwest · 4.2 mi
- Indian Hill611 ftsouth-southeast · 4.5 mi
Light
| Date | Sunrise | Sunset | Golden hour |
|---|---|---|---|
| March equinox | 07:07 | 19:15 | 18:40 |
| June solstice | 05:38 | 20:33 | 19:53 |
| September equinox | 06:51 | 19:02 | 18:26 |
| December solstice | 07:19 | 16:44 | 16:02 |
Local time (America/Chicago). Computed for this exact position.
Where it is
- O’Fallon14.7 mi south
- Saint Charles18.7 mi southeast
- Saint Louis37.4 mi southeast
Take the scenic way to Mark Decker Platform.
Byway plans around your taste, verified places, real weather and opening hours — then opens every leg in Google Maps with one tap.
How high is Mark Decker Platform?
Mark Decker Platform sits at about 433 feet (132 m).
What can you see from Mark Decker Platform?
From Mark Decker Platform: Batchtown State Fish and Waterfowl Management Area (N, 2.7 mi); Titus Hollow Public Access Area (N, 3.4 mi); Jim Crow Island (NNW, 4.2 mi); Indian Hill (SSE, 4.5 mi).
What is the nearest town to Mark Decker Platform?
O’Fallon, 15 miles S of Mark Decker Platform.
What is the next lookout after Mark Decker Platform?
Lowest Point in Illinois is the next surfaced lookout along the same route after Mark Decker Platform.
Drive to Mark Decker Platform with Byway
Byway plans the scenic way there — real places along Great River Road, real weather, zero hallucinations — and hands the turns to the navigation you already use.
Byways with this lookout
Day trips start here
- St. Charles · 18 mi
- Ferguson · 27 mi
- St. Louis County · 28 mi
- Alton · 29 mi
Locals make it Verified.
Mark Decker Platform — confirmed, rated, and photographed by people who actually pulled over. A local confirmation is what upgrades a lookout from Discovered to Verified. Zero hallucinations.
Confirmed by locals
No local confirmations yet. Stood here? Yours is the one that upgrades this lookout to Verified.
Ratings
No ratings yet. Stood at this lookout? Be the first to rate it.
No written reviews yet.
Field notes
No field notes yet. Know the gate hours or the best pull-in? Leave the note you wish you'd had.
Photos
No photos yet.
Sign in to confirm this lookout, rate it, add photos, and leave field notes.
More lookouts on Great River Road
Named places near this lookout
- Sandy Island Bald Eagle Sanctuary Nature reserve · 0.21 mi
- Cave Spring Spring · 1.49 mi
- Sandy Island Nature reserve · 2.09 mi
- Jim Crow Island Picnic site · 4.18 mi
- Cuivre Island Picnic site · 5.63 mi
- Large Stag Island Picnic site · 5.68 mi
- Goat Cliff Cliff · 7.95 mi
- Mark Twain National Wildlife Refuge Park · 8.57 mi