Areas by CR

Note

The Challenge Ratings are based on the idea that you'll be with a party.

If you're going solo, it's suggested you add 2-3 levels to the CR (in many cases (Areas), you are better off adding 4-5 Levels...depending on your Build, and especially whether or not your Build utilizes Magic (divine/arcane) or UMD (considering how easily dispellable UMD is from Scrolls).

The stated CR of some areas is quite wildly different from the real difficulty.

Distribution

Levels	Area Count (needs to be recounted ;-))
00-05	17
05-10	20
10-15	15
15-20	13
20-25	13
25-30	5

Surface Level 0-5

CR	Area
0.5	Soubar Well
1	Chionthar East, Next to BG South - Wyrms Crossing
1	Mausoleum (from Graveyard)
1.5	BG East, Graveyard
2	BG North, Bandit Cave
2	Soubar Ruins
2	Hilltop Ruins Level 1
2,5	Mausoleum Floor 2
2.5	Hilltop Ruins Levels 2-3
2.5	BG, East Gate Sewers
2.5	Trade Way, Road south of BG
2.5	Soubar, Bane Temple
3	Boareskyr Bridge, Bear Cave
3	Gibberling Cave
3	Chionthar East, Ruins
4	BG, Palace District Sewers
4	Cloakwood East
4	Boareskyr Bridge
4,5	Underground Ruin (Mausoleum Floor 3)

Surface Level 5-10

CR	Area
5	Northern Tradeway, Road south of Soubar
6	Lion's Way, Road south of FAI
6	Northern Tradeway, Ant Burrow
6	North of Beregost, Road
6	Cloakwood East, Mine
6	Ulgoth's Beard, Island
7	North of Beregost, Goblin Mine
7	Thundar's Ride (CR 8 at night)
7	Boareskyr Bridge, Bridgefort
7	Sea Cave Trolls, Next to Candlekeep
8	North of Beregost, Overgrown Abandoned Chapel
8	BG, Sewer Bowels
8	Thundar's Ride, Water Cave
8	High Hedge
8	Woods of Sharp Teeth and Orc Cave
8	Lion's Way, Gnoll Cave
8	Cloakwood Central
9	Dragonspear Exterior and Castle
10	Cloakwood Central, Minotaur Cave
10	BG, Undercity

Surface Level 10-15

CR	Area
12	Cloakwood Central, Hag Cave
12	Cloakwood North-West
12	Chionthar West, Next to Ulgoth's Beard
13	Uldoon's Trail, North of Nashkel
13	Cloakwood North-West, Haunted House Level 1
13	Skuldaask's Cave
14	Cloakwood North-West, Haunted House Level 2
14	High Moor South
14	Ulgoth's Beard, Crab Cave
14	Xvarts
14	Fields of the Dead
15	Troll Claws, Elder Ogre Stronghold
15	Gullykin, Crypt
15	South of Beregost, Road
15	Winding Waters

Surface Level 15-20

CR	Area
16	Fields of the Dead, Crypt
16	Troll Claws, Ogre Cave
16	Corm Orp
16	Winding Waters Temple
16	Durlag's Exterior and Tower
16	Nashkel Foothills
17	Nashkel's Mine Exterior
18	Troll Claws
18	Ulcaster Ruins
19	Durlag's Labyrinth Levels 1-2
19	Nashkel's Mine
19	Cloud Peaks
20	Troll Claws, Troll Cave
20	Ulcaster Shadow Ruins
20	Yuan-ti Hills

Surface Level 20-25

CR	Area
21	Searing Tunnels and Searing Caverns
21	Cloakwood North-West, Haunted House Level 3
22	Ice Cave
22	Durlag's Labyrinth Level 3
22	Durlag's Labyrinth Level 4
23	Trollclaws, Old Mine
23	High Moor, Spirit Troll Cave
23	Wyrm's Cave
23	Yuan-ti Temple
23	Reaching Woods
23	Lizard Cave
24	Stone Giants
24	Vault Level 1
24	Forest of Wyrms
25	Vault Level 2

Surface Level 25-30

CR	Area
27	Frost Giants
27	Graypeaks
28	Speartop
29	Vault Level 3
29	Netherese Maze
30	Lyran's Hold

Upper Dark Areas

CR	Area
6	Garth Grottoes
10	Titanfist Mines
15	Kro's Layrinth
18	Kro's Descend

Underdark Level 0-5

CR	Area
1	Sewers
1	Varalla's Passage
1	Wine Cellar & Herb Garden
1	S'samath Tombs
2	Mushroom Grove
3	South of Varalla's
4	West of Varalla's
5	Goblin Lake
5	Spore Grove

Underdark Level 6-10

CR	Area
9	Northwest of River
9	Upper Goblin Cave
9	Lower Goblin Cave
10	Southwest of River

Underdark Level 11-15

CR	Area
12	Tarpits
14	North of Tarpits
13	Large Crypt
14	Illithid Mine Cavern
14	Illithid Mines
15	Ophidian Tunnels

Underdark Level 16-20

CR	Area
16	Illithid Hive
16	South of Tarpits
16	Myconid Circles
20	East of Mistlake
20	The Wilds

Underdark Level 21-25

CR	Area
21	Duergar Compound
24	The Wilds Descent

Underdark Level 26-30

CR	Area
28	Oghrann Great Halls
30	Netherese Ruins

And Avernus...

Exists too.