diff --git a/app/src/main/java/de/westnordost/streetcomplete/data/osm/download/OsmQuestDownload.java b/app/src/main/java/de/westnordost/streetcomplete/data/osm/download/OsmQuestDownload.java
index 03df9d29c9..47ff442652 100644
--- a/app/src/main/java/de/westnordost/streetcomplete/data/osm/download/OsmQuestDownload.java
+++ b/app/src/main/java/de/westnordost/streetcomplete/data/osm/download/OsmQuestDownload.java
@@ -6,6 +6,7 @@
 import java.util.Collection;
 import java.util.HashMap;
 import java.util.Iterator;
+import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.Future;
@@ -28,9 +29,12 @@
 import de.westnordost.osmapi.map.data.BoundingBox;
 import de.westnordost.osmapi.map.data.Element;
 import de.westnordost.osmapi.map.data.LatLon;
+import de.westnordost.streetcomplete.util.SphericalEarthMath;
 
 public class OsmQuestDownload
 {
+	public static final int MAX_GEOMETRY_LENGTH_IN_METERS = 500;
+
 	private static final String TAG = "QuestDownload";
 
 	// injections
@@ -185,6 +189,18 @@ private boolean mayCreateQuestFrom(
 			return false;
 		}
 
+		// do not create quests that refer to geometry that is too long for a surveyor to be
+		// expected to survey
+		if(geometry.polylines != null)
+		{
+			double distance = 0;
+			for (List<LatLon> polyline : geometry.polylines)
+			{
+				distance += SphericalEarthMath.distance(polyline);
+			}
+			if(distance > MAX_GEOMETRY_LENGTH_IN_METERS) return false;
+		}
+
 		// do not create quests whose marker is at a blacklisted position
 		if(blacklistedPositions != null && blacklistedPositions.contains(geometry.center))
 		{