diff --git a/__tests__/app.test.ts b/__tests__/app.test.ts
index 0fac045..9b9c926 100644
--- a/__tests__/app.test.ts
+++ b/__tests__/app.test.ts
@@ -224,7 +224,7 @@ describe('🧪 Express Application', () => {
 
 		describe('DELETE /api/devices/delete', () => {
 			const body = {
-				device_uuid: '5804f943-4aaf-432f-83d8-62028827ac57',
+				device_uuid: 'e062ebb6-4f14-4123-87bc-d31791756107',
 			};
 			it('204: should return no content on successful deletion', () => {
 				return request(app)
@@ -300,5 +300,70 @@ describe('🧪 Express Application', () => {
 				return request(app).post('/api/cats/update').send(data).expect(401);
 			});
 		});
+
+		describe('GET /api/cats/leaderboard/:range', () => {
+			it('400: should return when passed an invalid date range', () => {
+				return request(app)
+					.get('/api/cats/leaderboard/INVALID')
+					.expect(400)
+					.then(({ body: { success, message } }) => {
+						expect(success).toBe(false);
+						expect(message).toBe("'invalid' is not a recognized range");
+					});
+			});
+			describe('RANGE', () => {
+				it('200: DAILY', () => {
+					return request(app)
+						.get('/api/cats/leaderboard/DAILY')
+						.expect(200)
+						.then(({ body: { success, data, range } }) => {
+							expect(success).toBe(true);
+							expect(range).toBe('daily');
+							expect(data).toBeSorted();
+							expect(data.length).toBe(2);
+						});
+				});
+				it('200: WEEKLY', () => {
+					return request(app)
+						.get('/api/cats/leaderboard/WEEKLY')
+						.expect(200)
+						.then(({ body: { success, data, range } }) => {
+							expect(success).toBe(true);
+							expect(range).toBe('weekly');
+							expect(data).toBeSorted();
+						});
+				});
+				it('200: MONTHLY', () => {
+					return request(app)
+						.get('/api/cats/leaderboard/MONTHLY')
+						.expect(200)
+						.then(({ body: { success, data, range } }) => {
+							expect(success).toBe(true);
+							expect(range).toBe('monthly');
+							expect(data).toBeSorted();
+						});
+				});
+				it('200: YEARLY', () => {
+					return request(app)
+						.get('/api/cats/leaderboard/YEARLY')
+						.expect(200)
+						.then(({ body: { success, data, range } }) => {
+							expect(success).toBe(true);
+							expect(range).toBe('yearly');
+							expect(data).toBeSorted();
+						});
+				});
+				it('200: ALL_TIME', () => {
+					return request(app)
+						.get('/api/cats/leaderboard/all_time')
+						.expect(200)
+						.then(({ body: { success, data, range } }) => {
+							expect(success).toBe(true);
+							expect(range).toBe('all_time');
+							expect(data).toBeSorted();
+						});
+				});
+			});
+		});
 	});
 });
diff --git a/jest.config.js b/jest.config.js
index a3b97a0..96703d5 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -4,4 +4,5 @@ module.exports = {
 	transform: {
 		'^.+.tsx?$': ['ts-jest', {}],
 	},
+	setupFilesAfterEnv: ['jest-sorted'],
 };
diff --git a/package-lock.json b/package-lock.json
index b219268..55e298d 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -24,6 +24,7 @@
 				"globals": "^15.12.0",
 				"husky": "^9.1.7",
 				"jest": "^29.7.0",
+				"jest-sorted": "^1.0.15",
 				"lint-staged": "^15.2.10",
 				"nodemon": "^3.1.7",
 				"prettier": "3.3.3",
@@ -5353,6 +5354,13 @@
 				"node": ">=10"
 			}
 		},
+		"node_modules/jest-sorted": {
+			"version": "1.0.15",
+			"resolved": "https://registry.npmjs.org/jest-sorted/-/jest-sorted-1.0.15.tgz",
+			"integrity": "sha512-bb5HzfyUqv22ToD63KRACZiwHVRVVj6/bl53VOODNQSzmTwKuTM0zYI73aByYulYVkugPmgGBXUTY8YLJYotKw==",
+			"dev": true,
+			"license": "ISC"
+		},
 		"node_modules/jest-util": {
 			"version": "29.7.0",
 			"resolved": "https://registry.npmjs.org/jest-util/-/jest-util-29.7.0.tgz",
diff --git a/package.json b/package.json
index 64070f7..794c170 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,7 @@
 		"globals": "^15.12.0",
 		"husky": "^9.1.7",
 		"jest": "^29.7.0",
+		"jest-sorted": "^1.0.15",
 		"lint-staged": "^15.2.10",
 		"nodemon": "^3.1.7",
 		"prettier": "3.3.3",
@@ -62,4 +63,4 @@
 			"npm run format"
 		]
 	}
-}
\ No newline at end of file
+}
diff --git a/prisma/seed.ts b/prisma/seed.ts
index b66b13f..2132680 100644
--- a/prisma/seed.ts
+++ b/prisma/seed.ts
@@ -28,12 +28,13 @@ async function seeder() {
 			name: 'Tiddles Collar',
 			owner_id: user1.id,
 			uuid: '5804f943-4aaf-432f-83d8-62028827ac57',
+			last_pulse_at: '2024-11-25T16:22:11.108Z',
+			last_location: { lon: -1.445, lat: 53.8075 },
 			location_history: [
-				{ lon: -1.445, lat: 53.8075 },
-				{ lon: -1.446, lat: 53.807 },
-				{ lon: -1.447, lat: 53.8065 },
-				{ lon: -1.4485, lat: 53.806 },
-				{ lon: -1.4495, lat: 53.8055 },
+				{ lon: -1.446, lat: 53.807, timestamp: '2024-11-25T16:15:11.108Z' },
+				{ lon: -1.447, lat: 53.8065, timestamp: '2024-11-25T16:08:11.108Z' },
+				{ lon: -1.4485, lat: 53.806, timestamp: '2024-11-25T16:01:11.108Z' },
+				{ lon: -1.4495, lat: 53.8055, timestamp: '2024-11-25T15:54:11.108Z' },
 			],
 		},
 	});
@@ -45,17 +46,30 @@ async function seeder() {
 			name: 'A Collar',
 			owner_id: user1.id,
 			uuid: '36932d18-78a2-4ceb-b979-64a5ed441551',
+			last_pulse_at: '2024-11-25T16:22:11.108Z',
+			last_location: { lon: -1.447, lat: 53.8035 },
 			location_history: [
-				{ lon: -1.447, lat: 53.8035 },
-				{ lon: -1.4485, lat: 53.804 },
-				{ lon: -1.449, lat: 53.8045 },
-				{ lon: -1.45, lat: 53.805 },
-				{ lon: -1.451106, lat: 53.806201 },
+				{ lon: -1.4485, lat: 53.804, timestamp: '2024-11-25T16:15:11.108Z' },
+				{ lon: -1.449, lat: 53.8045, timestamp: '2024-11-25T16:08:11.108Z' },
+				{ lon: -1.45, lat: 53.805, timestamp: '2024-11-25T16:01:11.108Z' },
+				{
+					lon: -1.451106,
+					lat: 53.806201,
+					timestamp: '2024-11-25T15:54:11.108Z',
+				},
 			],
 		},
 	});
 
-	// cm3pyzthe000108jka5f7hw99
+	await prisma.device.upsert({
+		where: { uuid: 'e062ebb6-4f14-4123-87bc-d31791756107' },
+		update: {},
+		create: {
+			name: 'A Collar',
+			owner_id: user1.id,
+			uuid: 'e062ebb6-4f14-4123-87bc-d31791756107',
+		},
+	});
 
 	await prisma.cat.upsert({
 		where: { id: 'cm3pr1rkb000008l8fs7icr9g' },
diff --git a/src/controllers/cats.ts b/src/controllers/cats.ts
index 2016c58..3d72447 100644
--- a/src/controllers/cats.ts
+++ b/src/controllers/cats.ts
@@ -45,7 +45,7 @@ export function updateCat(
 	cats.fetchCatsByUserID(user.id).then((usersCats) => {
 		// ensure that the authenticated user owns the cat
 		const catMatch = usersCats.find((cat) => cat.id === result.body.cat_id);
-		if (!catMatch) return next({ status: 404, message: 'Cat does not exist' });
+		if (!catMatch) throw new Error('no cat found');
 
 		delete result.body.cat_id;
 		cats.updateCat(catMatch.id, result.body).then((updated_cat) => {
@@ -53,3 +53,24 @@ export function updateCat(
 		});
 	});
 }
+
+export async function getLeaderboardWithRange(
+	request: Request,
+	response: Response,
+	next: NextFunction
+) {
+	const validRanges = ['daily', 'weekly', 'monthly', 'yearly', 'all_time'];
+	let { range } = request.params;
+
+	range = range.toLowerCase();
+
+	if (!validRanges.includes(range))
+		return next({
+			status: 400,
+			message: `'${range}' is not a recognized range`,
+		});
+
+	const catsData = await cats.getAllCatsWithRange(range);
+
+	response.status(200).json({ success: true, data: catsData, range: range });
+}
diff --git a/src/models/cats.ts b/src/models/cats.ts
index 04d8a5e..b98ceb0 100644
--- a/src/models/cats.ts
+++ b/src/models/cats.ts
@@ -1,4 +1,6 @@
 import extendedClient from '../db/client';
+import Coordinate from '../type/CoordinateType';
+import coordsToScore from '../utils/coordsToScore';
 
 export async function createCat(
 	id: string,
@@ -45,3 +47,72 @@ export async function updateCat(id: string, payload: object) {
 		},
 	});
 }
+
+export async function getAllCatsWithRange(range: string) {
+	const startDate = new Date();
+	const endDate = new Date();
+
+	switch (range) {
+		case 'daily':
+			startDate.setDate(startDate.getDate() - 1);
+			break;
+		case 'weekly':
+			startDate.setDate(startDate.getDate() - 7);
+			break;
+		case 'monthly':
+			startDate.setMonth(startDate.getMonth() - 1);
+			break;
+		case 'yearly':
+			startDate.setFullYear(startDate.getFullYear() - 1);
+			break;
+		case 'all_time':
+			startDate.setTime(0);
+			break;
+	}
+
+	const data = await extendedClient.device.findMany({
+		// Join cat onto the result
+		include: {
+			cat: true,
+		},
+		where: {
+			// We don't want devices that have no data, or no associated cat
+			NOT: [
+				{
+					last_pulse_at: null,
+				},
+				{
+					cat: null,
+				},
+			],
+		},
+	});
+
+	// As the location history is nested as an array in the row, we'll just have to do some
+	// funky array methods. I wanted to use GTE and LTE, but apparently they don't work.
+	const sortedData = data
+		.map((cat) => {
+			// Get all location history that we care about
+			const historyInRange = cat.location_history.filter((item) => {
+				const parsedTimestamp = new Date(item.timestamp);
+				return parsedTimestamp > startDate && parsedTimestamp < endDate;
+			});
+			// Convert our history into a useable format
+			const historyAsCoordinates: Coordinate[] = historyInRange.map((item) => [
+				item.lat,
+				item.lon,
+			]);
+			// Create our final coordinates array that contains current location plus all the history
+			const coordinates: Coordinate[] = [
+				[cat.last_location.lat, cat.last_location.lon],
+				...historyAsCoordinates,
+			];
+			// Calculate the score
+			const score = coordsToScore(coordinates);
+			// Return an object with the score K:V appended
+			return { ...cat, score: score };
+		})
+		.sort((a, b) => b.score - a.score); // Sort descending
+
+	return sortedData;
+}
diff --git a/src/models/devices.ts b/src/models/devices.ts
index 5cb8bdc..81beca9 100644
--- a/src/models/devices.ts
+++ b/src/models/devices.ts
@@ -48,6 +48,7 @@ export async function updateDevice(
 		history.push({
 			lat: currentInformation.last_location.lat,
 			lon: currentInformation.last_location.lon,
+			timestamp: new Date().toISOString(),
 		});
 		// We have previous data. Lets push it to the history before we overwrite
 	}
diff --git a/src/routes/cats.ts b/src/routes/cats.ts
index 9d6e68f..5a78454 100644
--- a/src/routes/cats.ts
+++ b/src/routes/cats.ts
@@ -6,5 +6,6 @@ const cats: Router = Router();
 
 cats.post('/create', usernameAuth, controller.createCat);
 cats.post('/update', usernameAuth, controller.updateCat);
+cats.get('/leaderboard/:range', controller.getLeaderboardWithRange);
 
 export default cats;
diff --git a/src/type/CoordinateType.ts b/src/type/CoordinateType.ts
new file mode 100644
index 0000000..38a3d17
--- /dev/null
+++ b/src/type/CoordinateType.ts
@@ -0,0 +1,3 @@
+type Coordinate = [number, number];
+
+export default Coordinate;
diff --git a/src/type/LocationHistoryType.ts b/src/type/LocationHistoryType.ts
index 45b7131..b791dd9 100644
--- a/src/type/LocationHistoryType.ts
+++ b/src/type/LocationHistoryType.ts
@@ -1,3 +1,3 @@
-type LocationHistoryType = { lat: number; lon: number }[];
+type LocationHistoryType = { lat: number; lon: number; timestamp: string }[];
 
 export default LocationHistoryType;
diff --git a/src/utils/coordsToScore.ts b/src/utils/coordsToScore.ts
new file mode 100644
index 0000000..ceac090
--- /dev/null
+++ b/src/utils/coordsToScore.ts
@@ -0,0 +1,25 @@
+/**
+ * @author PhilTBatt
+ */
+export default function coordsToScore(coordinates: [number, number][]): number {
+	const earthRadiusPerDegree = 111000;
+	let totalLength = 0;
+
+	for (let i = 0; i < coordinates.length - 1; i++) {
+		const [lat1, lng1] = coordinates[i];
+		const [lat2, lng2] = coordinates[i + 1];
+
+		const deltaLat = lat2 - lat1;
+		const deltaLng = lng2 - lng1;
+
+		const deltaLatMeters = deltaLat * earthRadiusPerDegree;
+		const deltaLngMeters =
+			deltaLng * earthRadiusPerDegree * Math.cos((lat1 * Math.PI) / 180);
+
+		totalLength += Math.sqrt(
+			deltaLatMeters * deltaLatMeters + deltaLngMeters * deltaLngMeters
+		);
+	}
+
+	return totalLength;
+}
diff --git a/tsconfig.json b/tsconfig.json
index 4daa626..a7232ec 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -2,7 +2,7 @@
 	"compilerOptions": {
 		"target": "es2016",
 		"module": "commonjs",
-		"types": ["jest"],
+		"types": ["jest", "jest-sorted"],
 		"esModuleInterop": true,
 		"forceConsistentCasingInFileNames": true,
 		"strict": true,