The Flatirons - East Faces
The Flatirons - East Faces
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Legendary rock formations just minutes above downtown Boulder, the Flatirons have offered a playground for generations and generations of hikers, scramblers and climbers. Known for having very moderate routes, a majority in the 5.0 to 5.5 range, strict bolting rules and not always protectable rock, it has naturally become the kingdom of soloists of various boldness.
With dozens of different pieces of rocks of all sizes, the Flatirons are also incredibly complex. Presented here are 120 routes on the most famous formations, including the five Flatirons themselves.
Download: Medium resolution, personal use only
Route List
1: Satan’s Slab, 5.4 R, S. Forsyth, 07/2025
2: The Omen, 5.7 R
3: Purgatory, 5.6 X, D. Bohn, D. Hahn, 1973
4: Perdition, 5.4 R, S. Forsyth, 07/2025
5: Enchanted Devil, 5.4 R, G. Roach, 1977
6: 666, 5.4, R. Rossiter, 1996
7: 667, 5.5 R, N. Flynn, J. Price
8: Stairway to Heaven, 5.3
9: East Face Left, Hillbilly’s Rock, 5.2, G. Roach
10: Jethro, 5.4 R, G. Humphry, D. Moore, 2001
11: East Face Center, Hillbilly’s Rock, 5.0, P. Ament, L. Dalke, 1961
12: East Face Right, Hillbilly’s Rock, 5.0
13: Southeast Ridge, Amoeboid, 5.4 R, T. Bubb, 2016
14: Buckets, 4th class
15: Direct Finish, 5.6
16: South Ridge, Hippo Head, 5.6
17: East Face, Hippo Head, 5.6
18: Days of Our Lives, 5.11a R, J. Haas, 2006
19: East Face, Hourglass, 4th class
20: East Face, Anomaly, 4th class
21: Spherical Implosion, 5.8 A3, R. Briggs, B. Briggs, 1971
22: North Nostril, 5.7, C. Simmon, L. Rydsdale, 1955
23: East Face Left, Fifth Flatiron, 5.5
24: Cat Scratches, 5.2
25: Pinball, 5.6 R, D. Thompson, L. Paik, 2013
26: East Face North, Fifth Flatiron, 5.4
27: Northeast Buttress, Fifth Flatiron, 5.6 R
28: East Face, Royal Arch, 4th class
29: El Camino Royale, 5.2
30: Red Wall Jug Haul, 5.6 R, K. Fridberg, 2015
31: Northern Rib, the Regency, 5.0
32: East Face, Upper Tangen Tower, 5.4, G. Roach, B. Inyan, 1984
33: East Face, Lower Tangen Tower, 5.8+ R
34: Variation to the Second Section Summit, 5.3
35: East Face, Fourth Flatiron, 5.4, G. Roach, D. Roberts, 1960
36: East Face, the Spaceship, 5.4 R, G. Roach, B. Roach, 1969
37: East Face, Last Flatironette, 4th class
38: East Face, Lost Flatironette, 5.3
39: Southeast Ridge, Fourth Flatironette, 5.4
40: East Ridge, Hammerhead, 4th class
41: Swing Time, 5.7
42: Uncle Nasty/Willy B. Direct, 5.10b, L. Graham, B. Briggs, 1986
43: East Face, Willy B., 5.8 R, T. Hornbein, D. Brinker, 1948
44: East Face, The Morning After, 5.7, G. Roach, J. Wheeler, 1956
45: Right Thing, 5.8+, P. Ament, L. Dalke, 1960
46: Blinded, 5.3
47: Slight Flight, 5.0
48: Non-Friction, 5.9 R
49: The Middle Way, 5.10b TR
50: Diatribe, 5.10d TR
51: Quarry Wall, 5.9
52: Don’t Stop Now, 5.9 X
53: Lichen Wars, 5.6 R
54: Lichen Resolution, 5.6 R
55: The Dolmen, 5.7 X, R. Rossiter, 1988
56: Smoother, 5.7 X, J. Erickson, J. Walsh, 1970
57: Crescent, 5.5, R. Rossiter, 1980
58: Crescent Variation, 5.6 X, R. Rossiter, 1988
59: Thinsignificance, 5.7 X, R. Rossiter, 1988
60: I Lichen Chimneys, 5.4 R, N. Chelton, 2011
61: Seams Like a Crack, 5.7 R, G. Bracksieck, J. Desrosiers, 2017
62: I Lichen Offwidths, 5.3 R, N. Chelton, 2011
63: Marine Life, 5.6, R. Rossiter, 1988
64: Thinquisition, 5.7 X, R. Rossiter, 1988
65: Dimetrodon , 5.5 X, S. Bartlett, J. Haas, 2008
66: South Face, East Ironing Board, 5.7 X, R. Rossiter, R. Woolf, 1988
67: Que Rasca, 5.7 R, R. Briggs, K. Solheim, 1973
68: Hand Crack, 5.4, P. Piana, 1987
69: Hey Slick, 5.5 R/X, P. Piana, 1987
70: Smooth, 5.7 R, P. Ament, G. Ryan, 1967
71: A Hike with Lao Tzu, 5.8, R. Rossiter, 1988
72: Crackin’ Up, 5.6
73: East Face Left, Jaws, 5.3 X
74: Water Groove, 5.2
75: East Face, Queen Anne’s Head, 5.4
76: 1911 Gully, 5.5
77: South Face, Third Flatiron, 5.10d R, R. Briggs, B. Briggs, 1986
78: Shoyu State, 5.10c, R. Rossiter, J. Rossiter, R. Woolf, 1988
79: Blazing Biners, 5.10a, R. Rossiter, J. Rossiter, R. Woolf, 1988
80: Sayonara, 5.12b, B. Ruckman, B. Hildenbrand, 1989
81: Third World Zone, 5.4, R. Rossiter, J. Rossiter, 1988
82: East Face Left, Third Flatiron, 5.5
83: Standard East Face, Third Flatiron, 5.4, F. Millard, E. Millard, 1906
84: Direct Finish, 5.4
85: Extra Point, 5.6 R, P. Ament, 1965
86: College Dropout, 5.7 R, R. Rossiter, J. Rossiter, 1982
87: Southeast Ridge, Third Flatironette, 4th class
88: North Ridge, Jaws, 4th class
89: East Chimney, Higher Deviation, 5.5
90: Southeast Ridge, Lower Deviation, 5.8
91: East Face Center, Lower Deviation, 5.7
92: East Face Right, Lower Deviation, 4th class
93: Chase the Sun, 5.4
94: South Sneak, 5.2
95: Southeast Ridge, Second Flatiron, 5.7, L. Kor, 1959
96: Southeast Overhang, 5.6 C2, L. Dalke, T. O’Donnell, 1963
97: Overlooked Overhang, 5.8
98: Dodge Block, 5.0
99: Free for All, 5.6
100: East Face Overhang, Second Flatiron, 5.10d, J. Erickson, D. Hunter, 1973
101: Wallflower, 5.12a R, J. Haas, D. Johnson, 2007
102: Hornsby’s Ledges, 5.9, D. Hornsby, H. Walton, 1948
103: Freeway, 4th class
104: Way of the Ancients, 5.5
105: Hubris, 5.6 R
106: Atalanta, 5.3, G. Roach, 1987
107: Massugu, 5.5 R, R. Rossiter, 1988
108: Kamikaze Roofs, 5.8, R. Rossiter, 1988
109: Zig Zag, 5.7
110: Baker’s Way, 5.3
111: Fandango, 5.5
112: Yellow Brick Road, 5.7 R, R. Baldwin, R. Rossiter, 1977
113: Butterfly, 5.6 R, G. Roach, J. Wheeler, 1956
114: Direct East Face, First Flatiron, 5.6 R, P. Ament, L. Dalke, 1960
115: Red Slab Variation, 5.8 X
116: Northeast Gully, First Flatiron, 5.4
117: North Arête, First Flatiron, 5.4
118: East Face North Side, First Flatiron, 5.2
119: South Ridge, First Flatironette, 5.2
120: East Face, First Flatironette, 5.2
121: East Ridge, the Spy, 5.3 R
Sources
“Climbing Boulder’s Flatirons, Second Edition” Jason Haas, Sharp End Publishing, 2021
The Mountain Project
Leo Paik
Samuel Forsyth
Updates
Nov 27, 2021: First version published.
June 18, 2022: Graphic design update
April 14, 2024: Graphic design update
Sep 4, 2025: Graphic design update
Feb 26, 2026: Massive color update, line thickness, etc.
Sep 22, 2026: Added route 4 (Perdition) from July 2025, thanks to Samuel Forsyth for the FA and the info.
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