1
Grand River National Grassland
Managed by United States Forest Service
21,111 acres5.7 mi of trail
Dog rules not recorded
No trailhead mapped yet
Outdoors · Marshfield
Marshfield, SD parks, trails & bike paths
About 47% of Marshfield is conserved land, roughly 21,455 acres. There are about 13 miles of mapped trails, and the biggest networks are in Grand River National Grassland (5.7 mi).
Conserved land, trails, parks and bike routes in Marshfield, measured from OpenStreetMap and USGS data.
At a glance
Marshfield outdoors
Conserved land
47%
21,455 of 45,632 acres
Trails
13 mi
0.2 mi per sq mi · 6 on conserved land
Parks & preserves
1
named on the map
Bike routes
0.0 mi
0.0 mi lanes · 0.0 mi off-road paths
Conserved land is a share of the whole town area. Bike lanes are often missing from the map in smaller towns, so that number is likely low.
Map
Conserved land, trails & bike routes
Tap a number or a place below to zoom in© OpenStreetMap contributors · USGS PAD-US
Places to walk
Parks & preserves with trails
Ranked by mapped trail miles. Directions go to the nearest marked trailhead or public parking.
Things to do
Beaches, playgrounds, falls & more
Pick a kind of place for the list, directions, or pins on the map above.
Peaks in Marshfield
Square Top Butte2,854 ft elevation · In Grand River National Grassland
Water
Lakes & rivers
Tap a name for directions.
Who protects the land
21,455 conserved acres
Who manages it, from PAD-US. Approximate, because parcels can overlap.
Biking & sports
Bike routes, courts & fields
- Painted or protected bike lanes0.0 mi
- Off-road bike paths0.0 mi
- Shoulders & shared lanes0.0 mi
Public lands
The biggest protected places in Marshfield
From USGS PAD-US: who manages each one and whether visitors are welcome.
National Grassland 21,103 acState Resource Management Area 352 ac
| Place | Managed by | Acres | Public access |
|---|---|---|---|
| Grand River National GrasslandNational Grassland | U.S. Forest Service | 21,103 | Open |
| Sd Public LandState Resource Management Area | State land board | 352 | Open |
Nearby
Marshfield and its neighbors
Towns whose outdoors data has been built so far.
Trail talk
Conditions & tips from neighbors
No recent posts about Marshfield's trails yet. Muddy, icy, a bridge out, where to park: a quick post helps the next person.
Sources: trails, parks, preserves, courts and bike lanes © OpenStreetMap contributors (ODbL), map data as of 2026-09-28. Conserved land: USGS Gap Analysis Project, Protected Areas Database of the United States (PAD-US). Measured against the Census town boundary.
How we measure
"Trails" are OpenStreetMap paths, bridleways, public tracks and unpaved footways, plus footways inside a park or preserve or on a named trail route. Sidewalks are left out. Areas are counted on a 27.3-meter grid, so overlapping parcels count once. "Conserved" includes conservation easements, which protect land from development but are usually private property. Trailheads are the nearest marked trailhead, public parking lot or information board within about 150 meters of a preserve. Dog rules come from OpenStreetMap when someone has tagged them; otherwise we show what's typical for the land manager, or say the rules aren't recorded.