Tales of monsters in the loch date back to before the times of Princess Katharine, who shared the stories with the hatchlings on Avalon. In the 6th century, St. Columba traveled to Loch Ness, where he tamed one of the animals living there. 
In 1994, David Xanatos commissioned Dr. Anton Sevarius to capture the Loch Ness monster. He and his security force, led by Bruno, captured one of the beasts, dubbed Nessie, and were pursuing one Sevarius called Big Daddy, when the Avalon travelers appeared on Loch Ness. During the pursuit of Big Daddy, the security team overturned the skiff carrying the travelers, and they captured Angela, bringing her to a secret base.
Goliath, Elisa, and Bronx washed up on the shores of Loch Ness, where they continued the search for Angela. During the day, Elisa found members of Xanatos' Security force, whom she tracked back to their base. Meanwhile, Sevarius had collared Nessie, and set her free, so as to track her to Big Daddy.
Unfortunately for Sevarius, the Avalon travelers managed to rescue Angela, un-collar Nessie, and destroy Sevarius' submarines. 
According to a tour guide, the loch is 24 miles long, a mile and a half wide, and up to 900 feet deep. 
1. Awakening 2. Awakening, Part Two 3. Awakening, Part Three 4. Awakening, Part Four 5. Awakening, Part Five 6. The Thrill of the Hunt 7. Temptation 8. Deadly Force 9. Enter MacBeth 10. The Edge 11. Long Way to Morning 12. Her Brother's Keeper 13. Reawakening
1. Leader of the Pack 2. Metamorphosis 3. Legion 4. A Lighthouse in the Sea of Time 5. The Mirror 6. The Silver Falcon 7. Eye of the Beholder 8. Vows 9. City of Stone, Part One 10. City of Stone, Part Two 11. City of Stone, Part Three 12. City of Stone, Part Four 13. High Noon
14. Outfoxed 15. The Price 16. Revelations 17. Double Jeopardy 18. Upgrade 19. Protection 20. The Cage 21. Avalon, Part One 22. Avalon, Part Two 23. Avalon, Part Three 24. Shadows of the Past 25. Heritage 26. Monsters
27. Golem 28. Sanctuary 29. M.I.A. 30. Grief 31. Kingdom 32. The Hound of Ulster 33. Walkabout 34. Mark of the Panther 35. Pendragon 36. Eye of the Storm 37. The New Olympians 38. The Green 39. Sentinel
40. Bushido 41. Cloud Fathers 42. Ill Met By Moonlight 43. Future Tense 44. The Gathering, Part One 45. The Gathering, Part Two 46. Vendettas 47. Turf 48. The Reckoning 49. Possession 50. Hunter's Moon, Part One 51. Hunter's Moon, Part Two 52. Hunter's Moon, Part Three
1. The Journey 2. Ransom 3. Runaways 4. Broadway Goes Hollywood 5. A Bronx Tail 6. The Dying Of The Light 7. And Justice For All 8. Genesis Undone 9. Generations 10. ...For It May Come True 11. To Serve Mankind 12. Seeing Isn't Believing 13. Angels In The Night
SLG comic books
Gargoyles #1. Clan Building Chapter One: Nightwatch Gargoyles #2. Clan Building Chapter Two: The Journey Gargoyles #3. Clan Building Chapter Three: Invitation Only Gargoyles #4. Clan Building Chapter Four: Masque Gargoyles #5. Clan Building Chapter Five: Bash Gargoyles #6. Clan Building Chapter Six: Reunion Gargoyles #7. Clan Building Chapter Seven: The Rock Gargoyles #8. Clan Building Chapter Eight: Rock & Roll Gargoyles #9. Clan Building Chapter Nine: Rock of Ages Gargoyles #10. Clan Building Chapter Ten: The Gate Gargoyles #11. Clan Building Chapter Eleven: Tyrants Gargoyles #12. Clan Building Chapter Twelve: Phoenix
Bad Guys #1. Strangers Bad Guys #2. The Lost Bad Guys #3. Estranged Bad Guys #4. Louse Bad Guys #5. Strangled Bad Guys #6. Losers