Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
2016 Tour de France
Table title:
Route and stages
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Stage </th><th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > Course </th><th colspan=1 rowspan=1 > Distance </th><th colspan=2 rowspan=1 > Type </th><th colspan=1 rowspan=1 > Winner </th></tr>
<tr> <th colspan=1 rowspan=1 > 1 </th><td colspan=1 rowspan=1 > 2 July </td><td colspan=1 rowspan=1 > Mont Saint-Michel to Utah Beach (Sainte-Marie-du-Mont) </td><td colspan=1 rowspan=1 > 188 km (117 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Flat stage </td><td colspan=1 rowspan=1 > Mark Cavendish (GBR) </td></tr>
<tr> <th colspan=1 rowspan=1 > 2 </th><td colspan=1 rowspan=1 > 3 July </td><td colspan=1 rowspan=1 > Saint-Lô to Cherbourg-en-Cotentin </td><td colspan=1 rowspan=1 > 183 km (114 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Flat stage </td><td colspan=1 rowspan=1 > Peter Sagan (SVK) </td></tr>
<tr> <th colspan=1 rowspan=1 > 3 </th><td colspan=1 rowspan=1 > 4 July </td><td colspan=1 rowspan=1 > Granville to Angers </td><td colspan=1 rowspan=1 > 223.5 km (139 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Flat stage </td><td colspan=1 rowspan=1 > Mark Cavendish (GBR) </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 4 </th><td colspan=1 rowspan=1 > 5 July </td><td colspan=1 rowspan=1 > Saumur to Limoges </td><td class="highlighted"  colspan=1 rowspan=1 > 237.5 km (148 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Flat stage </td><td colspan=1 rowspan=1 > Marcel Kittel (GER) </td></tr>
<tr> <th colspan=1 rowspan=1 > 5 </th><td colspan=1 rowspan=1 > 6 July </td><td colspan=1 rowspan=1 > Limoges to Le Lioran </td><td colspan=1 rowspan=1 > 216 km (134 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Medium mountain stage </td><td colspan=1 rowspan=1 > Greg Van Avermaet (BEL) </td></tr>
<tr> <th colspan=1 rowspan=1 > 6 </th><td colspan=1 rowspan=1 > 7 July </td><td colspan=1 rowspan=1 > Arpajon-sur-Cère to Montauban </td><td colspan=1 rowspan=1 > 190.5 km (118 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Flat stage </td><td colspan=1 rowspan=1 > Mark Cavendish (GBR) </td></tr>
<tr> <th colspan=1 rowspan=1 > 7 </th><td colspan=1 rowspan=1 > 8 July </td><td colspan=1 rowspan=1 > L'Isle-Jourdain to Lac de Payolle </td><td colspan=1 rowspan=1 > 162.5 km (101 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Medium mountain stage </td><td colspan=1 rowspan=1 > Steve Cummings (GBR) </td></tr>
<tr> <th colspan=1 rowspan=1 > 8 </th><td colspan=1 rowspan=1 > 9 July </td><td colspan=1 rowspan=1 > Pau to Bagnères-de-Luchon </td><td colspan=1 rowspan=1 > 184 km (114 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > High mountain stage </td><td colspan=1 rowspan=1 > Chris Froome (GBR) </td></tr>
<tr> <th colspan=1 rowspan=1 > 9 </th><td colspan=1 rowspan=1 > 10 July </td><td colspan=1 rowspan=1 > Vielha Val d'Aran (Spain) to Andorra-Arcalis (Andorra) </td><td colspan=1 rowspan=1 > 184.5 km (115 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > High mountain stage </td><td colspan=1 rowspan=1 > Tom Dumoulin (NED) </td></tr>
<tr> <th colspan=1 rowspan=1 >  </th><td colspan=1 rowspan=1 > 11 July </td><td colspan=2 rowspan=1 > Andorra </td><td colspan=1 rowspan=1 >  </td><td colspan=2 rowspan=1 > Rest day </td></tr>
<tr> <th colspan=1 rowspan=1 > 10 </th><td colspan=1 rowspan=1 > 12 July </td><td colspan=1 rowspan=1 > Escaldes-Engordany (Andorra) to Revel </td><td colspan=1 rowspan=1 > 197 km (122 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Medium mountain stage </td><td colspan=1 rowspan=1 > Michael Matthews (AUS) </td></tr>
<tr> <th colspan=1 rowspan=1 > 11 </th><td colspan=1 rowspan=1 > 13 July </td><td colspan=1 rowspan=1 > Carcassonne to Montpellier </td><td colspan=1 rowspan=1 > 162.5 km (101 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Flat stage </td><td colspan=1 rowspan=1 > Peter Sagan (SVK) </td></tr>
<tr> <th colspan=1 rowspan=1 > 12 </th><td colspan=1 rowspan=1 > 14 July </td><td colspan=1 rowspan=1 > Montpellier to Chalet Reynard (Mont Ventoux) </td><td colspan=1 rowspan=1 > 178 km (111 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > High mountain stage </td><td colspan=1 rowspan=1 > Thomas De Gendt (BEL) </td></tr>
<tr> <th colspan=1 rowspan=1 > 13 </th><td colspan=1 rowspan=1 > 15 July </td><td colspan=1 rowspan=1 > Bourg-Saint-Andéol to La Caverne du Pont-d'Arc </td><td colspan=1 rowspan=1 > 37.5 km (23 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Individual time trial </td><td colspan=1 rowspan=1 > Tom Dumoulin (NED) </td></tr>
<tr> <th colspan=1 rowspan=1 > 14 </th><td colspan=1 rowspan=1 > 16 July </td><td colspan=1 rowspan=1 > Montélimar to Villars-les-Dombes (Parc des Oiseaux) </td><td colspan=1 rowspan=1 > 208.5 km (130 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Flat stage </td><td colspan=1 rowspan=1 > Mark Cavendish (GBR) </td></tr>
<tr> <th colspan=1 rowspan=1 > 15 </th><td colspan=1 rowspan=1 > 17 July </td><td colspan=1 rowspan=1 > Bourg-en-Bresse to Culoz </td><td colspan=1 rowspan=1 > 160 km (99 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > High mountain stage </td><td colspan=1 rowspan=1 > Jarlinson Pantano (COL) </td></tr>
<tr> <th colspan=1 rowspan=1 > 16 </th><td colspan=1 rowspan=1 > 18 July </td><td colspan=1 rowspan=1 > Moirans-en-Montagne to Bern (Switzerland) </td><td colspan=1 rowspan=1 > 209 km (130 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Flat stage </td><td colspan=1 rowspan=1 > Peter Sagan (SVK) </td></tr>
<tr> <th colspan=1 rowspan=1 >  </th><td colspan=1 rowspan=1 > 19 July </td><td colspan=2 rowspan=1 > Bern (Switzerland) </td><td colspan=1 rowspan=1 >  </td><td colspan=2 rowspan=1 > Rest day </td></tr>
<tr> <th colspan=1 rowspan=1 > 17 </th><td colspan=1 rowspan=1 > 20 July </td><td colspan=1 rowspan=1 > Bern (Switzerland) to Finhaut-Émosson (Switzerland) </td><td colspan=1 rowspan=1 > 184.5 km (115 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > High mountain stage </td><td colspan=1 rowspan=1 > Ilnur Zakarin (RUS) </td></tr>
<tr> <th colspan=1 rowspan=1 > 18 </th><td colspan=1 rowspan=1 > 21 July </td><td colspan=1 rowspan=1 > Sallanches to Megève </td><td colspan=1 rowspan=1 > 17 km (11 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Mountain time trial </td><td colspan=1 rowspan=1 > Chris Froome (GBR) </td></tr>
<tr> <th colspan=1 rowspan=1 > 19 </th><td colspan=1 rowspan=1 > 22 July </td><td colspan=1 rowspan=1 > Albertville to Saint Gervais-les-Bains </td><td colspan=1 rowspan=1 > 146 km (91 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > High mountain stage </td><td colspan=1 rowspan=1 > Romain Bardet (FRA) </td></tr>
<tr> <th colspan=1 rowspan=1 > 20 </th><td colspan=1 rowspan=1 > 23 July </td><td colspan=1 rowspan=1 > Megève to Morzine </td><td colspan=1 rowspan=1 > 146.5 km (91 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > High mountain stage </td><td colspan=1 rowspan=1 > Ion Izagirre (ESP) </td></tr>
<tr> <th class="highlighted"  colspan=1 rowspan=1 > 21 </th><td colspan=1 rowspan=1 > 24 July </td><td colspan=1 rowspan=1 > Chantilly to Paris (Champs-Élysées) </td><td class="highlighted"  colspan=1 rowspan=1 > 113 km (70 mi) </td><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > Flat stage </td><td colspan=1 rowspan=1 > André Greipel (GER) </td></tr>
<tr> <th colspan=1 rowspan=1 >  </th><td colspan=2 rowspan=1 > Total </td><td colspan=5 rowspan=1 > 3,529 km (2,193 mi) </td></tr>
</table>
Question:
What was the longest stage of the 2016 Tour de France?
Answer:
In 2016 Tour de France, the fourth stage was the longest at 237.5 km (148 mi) and stage 21 was the shortest at 113 km (70 mi).