diff --git a/src/ol/format/kmlformat.js b/src/ol/format/kmlformat.js
index 2319cf4291..291482a23f 100644
--- a/src/ol/format/kmlformat.js
+++ b/src/ol/format/kmlformat.js
@@ -3,7 +3,6 @@
 // FIXME handle highlighted keys in StyleMaps - use styleFunctions
 // FIXME extractAttributes
 // FIXME extractStyles
-// FIXME gx:Track
 // FIXME http://earth.google.com/kml/1.0 namespace?
 // FIXME why does node.getAttribute return an unknown type?
 // FIXME text
@@ -49,6 +48,13 @@ ol.KML_RESPECT_VISIBILITY = false;
 ol.format.KMLVec2_;
 
 
+/**
+ * @typedef {{flatCoordinates: Array.<number>,
+ *            whens: Array.<number>}}
+ */
+ol.format.KMLGxTrackObject_;
+
+
 
 /**
  * @constructor
@@ -108,6 +114,15 @@ goog.inherits(ol.format.KML, ol.format.XML);
 ol.format.KML.EXTENSIONS_ = ['.kml'];
 
 
+/**
+ * @const {Array.<string>}
+ * @private
+ */
+ol.format.KML.GX_NAMESPACE_URIS_ = [
+  'http://www.google.com/kml/ext/2.2'
+];
+
+
 /**
  * @const {Array.<string>}
  * @private
@@ -553,6 +568,91 @@ ol.format.KML.readFlatLinearRing_ = function(node, objectStack) {
 };
 
 
+/**
+ * @param {Node} node Node.
+ * @param {Array.<*>} objectStack Object stack.
+ * @private
+ */
+ol.format.KML.gxCoordParser_ = function(node, objectStack) {
+  goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
+  goog.asserts.assert(goog.array.indexOf(
+      ol.format.KML.GX_NAMESPACE_URIS_, node.namespaceURI) != -1);
+  goog.asserts.assert(node.localName == 'coord');
+  var gxTrackObject = /** @type {ol.format.KMLGxTrackObject_} */
+      (objectStack[objectStack.length - 1]);
+  goog.asserts.assert(goog.isObject(gxTrackObject));
+  var flatCoordinates = gxTrackObject.flatCoordinates;
+  var s = ol.xml.getAllTextContent(node, false);
+  var re =
+      /^\s*([+\-]?\d+(?:\.\d*)?(?:e[+\-]?\d*)?)\s+([+\-]?\d+(?:\.\d*)?(?:e[+\-]?\d*)?)\s+([+\-]?\d+(?:\.\d*)?(?:e[+\-]?\d*)?)\s*$/i;
+  var m = re.exec(s);
+  if (m) {
+    var x = parseFloat(m[1]);
+    var y = parseFloat(m[2]);
+    var z = parseFloat(m[3]);
+    flatCoordinates.push(x, y, z, 0);
+  } else {
+    flatCoordinates.push(0, 0, 0, 0);
+  }
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {Array.<*>} objectStack Object stack.
+ * @private
+ * @return {ol.geom.MultiLineString|undefined} MultiLineString.
+ */
+ol.format.KML.readGxMultiTrack_ = function(node, objectStack) {
+  goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
+  goog.asserts.assert(goog.array.indexOf(
+      ol.format.KML.GX_NAMESPACE_URIS_, node.namespaceURI) != -1);
+  goog.asserts.assert(node.localName == 'MultiTrack');
+  var lineStrings = ol.xml.pushAndParse(
+      /** @type {Array.<ol.geom.LineString>} */ ([]),
+      ol.format.KML.GX_MULTITRACK_GEOMETRY_PARSERS_, node, objectStack);
+  if (!goog.isDef(lineStrings)) {
+    return undefined;
+  }
+  var multiLineString = new ol.geom.MultiLineString(null);
+  multiLineString.setLineStrings(lineStrings);
+  return multiLineString;
+};
+
+
+/**
+ * @param {Node} node Node.
+ * @param {Array.<*>} objectStack Object stack.
+ * @private
+ * @return {ol.geom.LineString|undefined} LineString.
+ */
+ol.format.KML.readGxTrack_ = function(node, objectStack) {
+  goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
+  goog.asserts.assert(goog.array.indexOf(
+      ol.format.KML.GX_NAMESPACE_URIS_, node.namespaceURI) != -1);
+  goog.asserts.assert(node.localName == 'Track');
+  var gxTrackObject = ol.xml.pushAndParse(
+      /** @type {ol.format.KMLGxTrackObject_} */ ({
+        flatCoordinates: [],
+        whens: []
+      }), ol.format.KML.GX_TRACK_PARSERS_, node, objectStack);
+  if (!goog.isDef(gxTrackObject)) {
+    return undefined;
+  }
+  var flatCoordinates = gxTrackObject.flatCoordinates;
+  var whens = gxTrackObject.whens;
+  goog.asserts.assert(flatCoordinates.length / 4 == whens.length);
+  var i, ii;
+  for (i = 0, ii = Math.min(flatCoordinates.length, whens.length); i < ii;
+       ++i) {
+    flatCoordinates[4 * i + 3] = whens[i];
+  }
+  var lineString = new ol.geom.LineString(null);
+  lineString.setFlatCoordinates(ol.geom.GeometryLayout.XYZM, flatCoordinates);
+  return lineString;
+};
+
+
 /**
  * @param {Node} node Node.
  * @param {Array.<*>} objectStack Object stack.
@@ -951,6 +1051,45 @@ ol.format.KML.outerBoundaryIsParser_ = function(node, objectStack) {
 };
 
 
+/**
+ * @param {Node} node Node.
+ * @param {Array.<*>} objectStack Object stack.
+ * @private
+ */
+ol.format.KML.whenParser_ = function(node, objectStack) {
+  goog.asserts.assert(node.nodeType == goog.dom.NodeType.ELEMENT);
+  goog.asserts.assert(node.localName == 'when');
+  var gxTrackObject = /** @type {ol.format.KMLGxTrackObject_} */
+      (objectStack[objectStack.length - 1]);
+  goog.asserts.assert(goog.isObject(gxTrackObject));
+  var whens = gxTrackObject.whens;
+  var s = ol.xml.getAllTextContent(node, false);
+  var re =
+      /^\s*(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})(Z|(?:([+\-])(\d{2})(?::(\d{2}))?))\s*$/;
+  var m = re.exec(s);
+  if (m) {
+    var year = parseInt(m[1], 10);
+    var month = parseInt(m[2], 10) - 1;
+    var day = parseInt(m[3], 10);
+    var hour = parseInt(m[4], 10);
+    var minute = parseInt(m[5], 10);
+    var second = parseInt(m[6], 10);
+    var date = new Date(year, month, day, hour, minute, second, 0);
+    var t = date.getTime() / 1000;
+    if (m[7] != 'Z') {
+      var sign = m[8] == '-' ? -1 : 1;
+      t += sign * 60 * parseInt(m[9], 10);
+      if (goog.isDef(m[10])) {
+        t += sign * 60 * 60 * parseInt(m[10], 10);
+      }
+    }
+    whens.push(t);
+  } else {
+    whens.push(0);
+  }
+};
+
+
 /**
  * @const {Object.<string, Object.<string, ol.xml.Parser>>}
  * @private
@@ -993,6 +1132,19 @@ ol.format.KML.FLAT_LINEAR_RINGS_PARSERS_ = ol.xml.makeParsersNS(
     });
 
 
+/**
+ * @const {Object.<string, Object.<string, ol.xml.Parser>>}
+ * @private
+ */
+ol.format.KML.GX_TRACK_PARSERS_ = ol.xml.makeParsersNS(
+    ol.format.KML.NAMESPACE_URIS_, {
+      'when': ol.format.KML.whenParser_
+    }, ol.xml.makeParsersNS(
+        ol.format.KML.GX_NAMESPACE_URIS_, {
+          'coord': ol.format.KML.gxCoordParser_
+        }));
+
+
 /**
  * @const {Object.<string, Object.<string, ol.xml.Parser>>}
  * @private
@@ -1060,6 +1212,16 @@ ol.format.KML.MULTI_GEOMETRY_PARSERS_ = ol.xml.makeParsersNS(
     });
 
 
+/**
+ * @const {Object.<string, Object.<string, ol.xml.Parser>>}
+ * @private
+ */
+ol.format.KML.GX_MULTITRACK_GEOMETRY_PARSERS_ = ol.xml.makeParsersNS(
+    ol.format.KML.GX_NAMESPACE_URIS_, {
+      'Track': ol.xml.makeArrayPusher(ol.format.KML.readGxTrack_)
+    });
+
+
 /**
  * @const {Object.<string, Object.<string, ol.xml.Parser>>}
  * @private
@@ -1106,7 +1268,12 @@ ol.format.KML.PLACEMARK_PARSERS_ = ol.xml.makeParsersNS(
       'phoneNumber': ol.xml.makeObjectPropertySetter(ol.format.KML.readString_),
       'styleUrl': ol.xml.makeObjectPropertySetter(ol.format.KML.readURI_),
       'visibility': ol.xml.makeObjectPropertySetter(ol.format.KML.readBoolean_)
-    });
+    }, ol.xml.makeParsersNS(
+        ol.format.KML.GX_NAMESPACE_URIS_, {
+          'MultiTrack': ol.xml.makeObjectPropertySetter(
+              ol.format.KML.readGxMultiTrack_, 'geometry')
+        }
+    ));
 
 
 /**
diff --git a/src/ol/geom/multilinestring.js b/src/ol/geom/multilinestring.js
index 18b00c2eb6..98cfb3402d 100644
--- a/src/ol/geom/multilinestring.js
+++ b/src/ol/geom/multilinestring.js
@@ -1,5 +1,7 @@
 goog.provide('ol.geom.MultiLineString');
 
+goog.require('goog.array');
+goog.require('goog.asserts');
 goog.require('ol.extent');
 goog.require('ol.geom.LineString');
 goog.require('ol.geom.SimpleGeometry');
@@ -163,3 +165,26 @@ ol.geom.MultiLineString.prototype.setFlatCoordinates =
   this.ends_ = ends;
   this.dispatchChangeEvent();
 };
+
+
+/**
+ * @param {Array.<ol.geom.LineString>} lineStrings LineStrings.
+ */
+ol.geom.MultiLineString.prototype.setLineStrings = function(lineStrings) {
+  var layout = ol.geom.GeometryLayout.XY;
+  var flatCoordinates = [];
+  var ends = [];
+  var i, ii;
+  for (i = 0, ii = lineStrings.length; i < ii; ++i) {
+    var lineString = lineStrings[i];
+    if (i === 0) {
+      layout = lineString.getLayout();
+    } else {
+      // FIXME better handle the case of non-matching layouts
+      goog.asserts.assert(lineString.getLayout() == layout);
+    }
+    goog.array.extend(flatCoordinates, lineString.getFlatCoordinates());
+    ends.push(flatCoordinates.length);
+  }
+  this.setFlatCoordinates(layout, flatCoordinates, ends);
+};
diff --git a/src/ol/xml.js b/src/ol/xml.js
index 5d1a954e25..e166ce94ca 100644
--- a/src/ol/xml.js
+++ b/src/ol/xml.js
@@ -149,11 +149,13 @@ ol.xml.makeObjectPropertySetter = function(valueReader, opt_property, opt_obj) {
 /**
  * @param {Array.<string>} namespaceURIs Namespace URIs.
  * @param {Object.<string, ol.xml.Parser>} parsers Parsers.
+ * @param {Object.<string, Object.<string, ol.xml.Parser>>=} opt_parsersNS
+ *     ParsersNS.
  * @return {Object.<string, Object.<string, ol.xml.Parser>>} Parsers NS.
  */
-ol.xml.makeParsersNS = function(namespaceURIs, parsers) {
+ol.xml.makeParsersNS = function(namespaceURIs, parsers, opt_parsersNS) {
   /** @type {Object.<string, Object.<string, ol.xml.Parser>>} */
-  var parsersNS = {};
+  var parsersNS = goog.isDef(opt_parsersNS) ? opt_parsersNS : {};
   var i, ii;
   for (i = 0, ii = namespaceURIs.length; i < ii; ++i) {
     parsersNS[namespaceURIs[i]] = parsers;
diff --git a/test/spec/ol/geom/multilinestring.test.js b/test/spec/ol/geom/multilinestring.test.js
index 1b7e67a3f2..b92928eb14 100644
--- a/test/spec/ol/geom/multilinestring.test.js
+++ b/test/spec/ol/geom/multilinestring.test.js
@@ -168,8 +168,25 @@ describe('ol.geom.MultiLineString', function() {
 
   });
 
+  describe('#setLineStrings', function() {
+
+    it('sets the line strings', function() {
+      var multiLineString = new ol.geom.MultiLineString(null);
+      var lineString1 = new ol.geom.LineString([[1, 2], [3, 4]]);
+      var lineString2 = new ol.geom.LineString([[5, 6], [7, 8]]);
+      multiLineString.setLineStrings([lineString1, lineString2]);
+      expect(multiLineString.getFlatCoordinates()).to.eql(
+          [1, 2, 3, 4, 5, 6, 7, 8]);
+      expect(multiLineString.getEnds()).to.eql([4, 8]);
+      var coordinates = multiLineString.getCoordinates();
+      expect(coordinates[0]).to.eql(lineString1.getCoordinates());
+      expect(coordinates[1]).to.eql(lineString2.getCoordinates());
+    });
+  });
+
 });
 
 
 goog.require('ol.extent');
+goog.require('ol.geom.LineString');
 goog.require('ol.geom.MultiLineString');