STEEP

In order to get this, you must find 110 Drop zones, 115 challenges and 149 Point of Interest in Alps. You only need to either ride through or take a helicopter to each location. Once you've discovered a new location for the first time, a notification will come up and in the menu it will tell you how many locations you have already discovered for any given mountain.

Here is a coordinate-specific location guide. Credit to 5hoe for the list:

The Cursed Mountains

The Doomed Retreat: 5004 S - 4132 W
The Haunted Resort: 5453 S - 4704 W
The Doomed Resort: 6118 S - 4822 W
Mammoth's Valley: 5084 S - 5198 W
Abandoned Mountain Lodges: 5954 S 5995 W
Doomed Bobsleigh Track: 5570 S - 6200 W
The Cursed Hotel: 7021 S - 7566 W
Rabbid's Valley: 4212 S - 6911 W
Abandoned Bobsleigh Track: 2911 S - 7049 W
Village of the Damned: 2415 S - 6866 W
Forgotten's Ultra Natural: 2647 S - 6570 W
Air Park: 2361 S - 5991 W
The Flooded Resort: 3275 S - 4540 W
Alignment of Carnac: 3716 S - 4475 W
Cursed Bobsleigh Track: 3937 S - 6034 W

Aoste

Theodule's Snowpark: 1868 N - 7286 E
Trockener Steg: 2401 N - 6898 E
Furgggletscher: 3288 N - 5796 E
Matterhorngletscher: 3303 N - 4829 E
Plan Torette: 5271 N - 3211 E
Salette: 6300 N - 3410 E
Pian Maison: 7676 N - 3571 E
Breuil Cervina: 6823 N - 4493 E
Valtournmenche: 7472 N - 5791 E
Cieloalto: 7361 N - 6536 E
Avouil: 6879 N - 6229 E
Bayettes: 6254 N - 6298 E
Ghiacciaio della Forca: 5219 N - 6494 E
Theodulgletscher: 4634 N - 6710 E
Ghiacciaio della Testa Grigia: 4252 N - 6499 E
Furi: 2794 N - 3883 E
Florio's Canyon: 5605 N - 4699 E
Giomein's Pillow Field: 5934 N - 4868 E
Le Rocce Nere: 6514 N - 5229 E
Ghiacciaio Inferior del Cervino: 6376 N - 5601 E
Ghiacciaio Superior del Cervino: 5106 N - 4808 E
Ghiacciaio del Leone: 4235 N - 4425 E
Corridoio dei Tre Orsi: 5703 N - 5645 E
Bivacco Ratti: 5568 N - 5078 E

Aravis

Le Villard: 7310 S - 5076 E
Snow Castle: 6670 S - 3691 E
Tournance: 7089 S - 1935 E
Gotty: 6841 S - 324 E
La Clusaz: 6921 S - 1771 W
Ultra Natural de la Giettaz: 5875 S - 2617 W
Le Chinaillon: 5670 S - 307 W
Les Nants: 3198 S - 1947 W
Lormay: 3369 S - 1425 W
Quais Grand Lac: 3777 S - 1719 W
La Blonniere: 3707 S - 1774 E
Les Failles: 2598 S - 2066 E
Snowpark de Bargy: 4785 S - 364 E
La Turte: 4788 S - 1391 E
Les Combettes: 5837 S - 3049 E
Ultra Natural de Foiroux: 5416 S - 2029 E
Snowpark de l'Empereur: 6453 S - 1764 E
Colomban: 4566 S - 3963 E
Les Glieres: 2830 S - 2737 W

Tyrol

Zweiselstein: 7126 S - 6153 E
Solden: 6767 S -5723 E
Oberburgle: 6175 S - 5915 E
Ferlienz: 6116 S - 5246 E
Bodenegg: 4254 S - 5322 E
Ferwallspritze's Pillow Field: 3735 S - 6043 E
Kirchenkogel's Ultra Natural: 5112 S - 6272 E
Schwartzkamm's Chaos: 2749 S - 4799 E
Querkogel's Pillow Field: 1343 S - 4256 E
Serfaus: 640 N - 4978 E
Boderkopfe's Gorge: 27 N - 5657 E
Ladis: 945 N - 7301 E
Ortle's Ultra Natural: 1063 S - 6894 E
Prinzen: 4044 S - 7314 E
Huerberg's Chaos: 210 S - 6261 E

Switzerland

Evolene: 1348 S - 1958 W
Eison: 545 S - 1645 W
Grimentz: 131 N - 1098 W
Tsevalire's Ravine: 465 S - 891 W
Le Prelet's Ultra Natural: 1705 S - 1451 W
Pas de Lona's Canyon: 1941 S - 1309 W
Chiesso: 1732 S - 499 W
Telepherique du Brandon: 962 S - 495 W
Tierfad: 620 N - 504 E
Observatory: 362 S - 496 E
Blanc de Moming's Ultra Natural: 1434 S - 2132 E
Aschhorn's Canyon: 110 S - 2750 E
Ruin Castle: 1151 N - 4297 E
Zermatt: 1420 N - 5450 E
Bielti: 1936 N - 3251 E
Burg: 1128 N - 1510 E
Mammoth's Pillow Field: 1186 S - 2687 E

Aiguilles

Montroc: 1658 S - 6859 W
Glacier de Talefre: 370 S - 6337 W
Le Tour: 495 S - 7321 W
Le Planet: 923 N - 7305 W
Snowpark des Nantillons: 1592 N - 7409 W
Les Chosalets: 2034 N - 7128 W
Glacier des Nantillons: 1612 N - 6043 W
Glacier de la Noire: 2520 N - 6270 W
Glacier des Pelerins: 1215 N - 5612 W
Glacier de Taconnaz: 1220 N - 3567 W
Glacier de l'Ancien: 931 N - 4050 W
Glacier d'Argentiere: 5 S - 4791 W
Ultra Natural d'Emosson: 187 S - 4121 W
Les Chavants: 2028 S - 4443 W
Les Houches: 1583 S - 4235 W
Emosson's Dam: 1844 S - 2645 W
Barberine: 532 S - 2814 W
Les Gens: 260 S - 1971 W
Montenvers: 113 S - 2370 W
Gietroz: 2390 S - 3282 W
Ultra Natural de Peclerey: 1096 N - 6209 W
Observatoire de l'Aiguille: 1557 N - 4895 W
Ultra Natural des Petoudes: 574 S - 6363 W
Pillow Field le Lavancher: 744 N - 2655 W

Mont Blanc

Hotel Steep: 665 N - 874 W
Bec a l'Oiseau: 827 N - 62 W
Pillow Field des Arendellys: 2530 N - 1122 E
Gracier de Bionnassay: 3208 N - 44 E
Les Toiles: 3345 N - 2556 E
Le Champel: 3370 N - 3312 E
Viaduc des Recorbes: 4257 N - 3096 E
Pillow Field de Vorassay: 4577 N - 2418 E
Glacier de Miage: 4586 N - 1550 E
La Gruvaz: 6918 N - 2760 E
La Villette: 6482 N - 1776 E
Glacier du Brouillard: 6371 N - 242 E
Peuterey: 7457 N - 1239 W
Glacier de Toule: 6343 N - 1664 W
Glacier de la Brenva: 7316 N - 3822 W
Plan Pincieux: 7398 N - 4667 W
Snowpark des Meutes: 5418 N - 6737 W
Glacier de Febrouze: 5769 N - 5578 W
Glacier de Pre de Bar: 4179 N - 5575 W
Glacier des Bossons: 1708 N - 2496 W
Glacier du Bourgeat: 2087 N - 1435 W
Le Grand Couloir: 1967 N - 918 W
Glacier des Gemaux: 3362 N - 1031 W
Bras des Gemaux: 3742 N - 1443 W
Glacier du Geant: 3901 N - 3695 W
Glacier du Mont Frety: 5947 N - 2696 W3
Glacier Rond: 3586 N - 2239 W
Canyon du Gouter: 2985 N - 2263 W
Couloir Marguerite: 5996 N - 4545 W
Febrouze: 6793 N - 7202 W
Falaises de la Muete: 4216 N - 7356 W
Les Chaletes de Truc: 7442 N - 1284 E
Canyon du Brouillard: 7574 N - 1433 E
Ravine des Hirondelles: 6871 N - 5666 W
La Turche: 5447 N - 2292 E