Question: Which castle that sits besides Loch Ness is associated with Robert Lauder of Quarrelwood?

Context paragraphs:
Robert Lauder of Quarrelwood: Sir Robert de Lawedre (Lauder), Knt., of Quarrelwood (died about 1370) was Justiciar of Scotia, a Scottish soldier of great prominence and Captain of Urquhart Castle.  He is recorded by Fordun, in his "Scotichronicon", and in "Extracta ex variis Cronicis Scocie" as "Robertus de Lavedir 'the good'"

Incident at Loch Ness: Incident at Loch Ness is a 2004 mockumentary starring, produced by and written by Werner Herzog and Zak Penn.  The small cast film follows Herzog and his crew (Gabriel Beristain, Russell Williams II) while working on the production of a movie project on the Loch Ness Monster entitled Enigma of Loch Ness.  "Incident at Loch Ness" won the New American Cinema Award at the 2004 Seattle International Film Festival.

Robert Lauder: Robert Lauder, M.A., Bachelor of Canon Law, was a Scottish prelate and Nuncio of the 15th century.  The Lauder family produced a large number of senior churchman in this period, and alongside Robert can be named William Lauder, Bishop of Glasgow, Alexander Lauder and Thomas Lauder, both Bishop of Dunkeld, and George Lauder, Bishop of Argyll.

RockNess: RockNess was an annual music festival which took place in Scotland at Clune Farm, Dores, on the banks of Loch Ness near Inverness in the Scottish Highlands.  The first Rockness festival took place on 24 June 2006 and continue to grow in size every year until 2013, which was the last running year of the festival.  In June 2008 AEG took over as the main promoter of the festival.  The festival was known as "the most beautiful festival in the world" and "the only festival with its own monster" due to its scenic location at Loch Ness which is the alleged home of the cryptozoological Loch Ness Monster.  Despite the festival's name it was not solely a rock festival but presented music from all genres, especially mainstream and electronic music.

Loch Ness Marathon: The Loch Ness Marathon (Gaelic: Marathon Loch Nis) is an annual marathon race in Scotland, held along the famous loch, Loch Ness, ending in Inverness.  The event is part of the Festival of Running, held annually at the beginning of October.  This also includes a 10K race and a 5K fun run, and attracts over 8,000 participants across all of the events.  The first prize in the marathon is approx 1,400 GBP.

Robert Lauder of Beilmouth: Sir Robert Lauder of Beilmouth, Knt., (died 24 June 1709) was an armiger, lawyer and Clerk of Exchequer in Scotland.  In 1683 he was made a Justice of the Peace for Haddingtonshire.  As Robert Lauder of Belhaven he was in the old Scottish parliament for Haddington in 1685, and, as Sir Robert Lauder of Beilmouth, in 1704.  He was also Commissioner of Supply for Haddington in 1689 and 1690.

Urquhart Castle: Urquhart Castle (   ; Scottish Gaelic: "Caisteal na Sròine" ) sits beside Loch Ness in the Highlands of Scotland.  The castle is on the A82 road, 21 km south-west of Inverness and 2 km east of the village of Drumnadrochit.

Loch Ness monster surface: In mathematics, the Loch Ness monster is a surface with infinite genus but only one end.  It appeared named this way already in a 1981-year article by .  The surface can be constructed by starting with a plane (which can be thought of as the surface of Loch Ness) and adding an infinite number of handles (which can be thought of as loops of the Loch Ness monster).

Loch Mhòr: Loch Mhòr is a loch in the traditional county of Inverness-shire in the Scottish Highlands.  It occupies much of the wide floor of Stratherrick which runs roughly parallel to Loch Ness around 3 mi / 5 km to its southeast.  A generally shallow body of water 179m above Loch Ness, Loch Mhòr achieves a depth in excess of 20m towards its southern end.

Loch Ness: Loch Ness ( ; Scottish Gaelic: "Loch Nis" ] ) is a large, deep, freshwater loch in the Scottish Highlands extending for approximately 37 km southwest of Inverness.  Its surface is 52 ft above sea level.  Loch Ness is best known for alleged sightings of the cryptozoological Loch Ness Monster, also known affectionately as "Nessie".  It is connected at the southern end by the River Oich and a section of the Caledonian Canal to Loch Oich.  At the northern end there is the Bona Narrows which opens out into Loch Dochfour, which feeds the River Ness and a further section of canal to Inverness.  It is one of a series of interconnected, murky bodies of water in Scotland; its water visibility is exceptionally low due to a high peat content in the surrounding soil.

Supporting paragraphs: Robert Lauder of Quarrelwood Urquhart Castle
Answer: Urquhart Castle