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Location: North Metro Denver > North Eastern
Plains
Length*: 183.99mi
SW End: Jct I-70 in Arvada (Exit 269)
NE End: Nebraska
border northeast of Julesburg (link to Chris Geelhart's
site)
Nationally: Continues northeast in Nebraska for less
than two miles to end at I-80 south of Big Springs (185mi)
Counties: Jefferson, Denver, Adams, Weld, Morgan,
Washington, Logan, Sedgwick
Places: Arvada, Wheat Ridge, Commerce City, Brighton,
Hudson, Keenesburg, Wiggins, Fort Morgan, Brush, Sterling,
Julesburg
NHS: All Interstates are by default part of the
NHS.
Freeway: Entire length (exit
list).
Business Routes:
- Unmarked spur to Keenesburg
- Loop through Fort
Morgan/Brush/Hillrose/Atwood/Sterling
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Location: Southeast Mountains > South Front
Range
Length*: 33.27mi
SW End: Jct SH 165 southwest of Beulah
NE End: Jct SH 45 in west Pueblo
Counties: Custer, Pueblo
Places: Beulah, Pueblo
Spur Connection: To
Beulah
Notes: Nine miles of SH 78 from SH 165
northeastward is still gravel.
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Location: North Eastern Plains
Length*: 23.89mi
S End: Jct I-70 Exit 304 south of Bennett
N End: Jct SH 52 at Prospect Valley
Counties: Adams, Weld
Places: Bennett, Prospect Valley
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Location: Central Mountains
Length*: 85.29mi
W End: Jct I-70 Exit 116 in Glenwood Springs
E End: Jct US 24 east of Twin Lakes
Counties: Garfield, Eagle, Pitkin, Lake
Places: Glenwood Springs, Carbondale, Basalt,
Snowmass, Aspen, Independence Pass, Twin Lakes
NHS: I-70 southeast to Galena St. in Aspen
Expressway: South side of Glenwood Springs to west side of Aspen
Business Route:
Basalt
Mountain Passes: West of Twin Lakes, Independence
Pass (12,095ft; 6% grade). Vehicles over 35 feet long are
prohibited from Independence Pass.
Sections Closed in Winter: The section of SH 82
over Independence Pass is closed every winter.
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Location: South Front Range > Southeast
Metro
Length*: 56.89mi
S End: Jct SH 21/Powers Blvd in northeast Colorado
Springs
N End: Jct SH 2 at Leetsdale Dr. and Colorado Blvd.
in Denver
Counties: El Paso, Douglas, Arapahoe, Denver
Places: Colorado Springs, Franktown, Parker,
Centennial, Foxfield, Aurora, Denver, Glendale
NHS:
E-470 northwest to Colorado Blvd. (SH 2)
Expressway:
- Four- and six-lane divided from Bayou Gulch Road
north of Franktown through Parker and Centennial into
Aurora to Quincy Ave. Slower-speed section through
Parker.
- Divided and undivided urban expressway from Quincy
Ave. into Denver. Speed limit finally drops below 45mph
at Mississippi Avenue. Interchange at Hampden Ave.
Roadways Names:
- In the southeast Denver metro: Parker Road
- Northwest of Quebec St. in Denver and Glendale:
Leetsdale Drive
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Location: Southern Mountains
Length*: 27.92mi
SE End: New
Mexico border southeast of Chromo (link to Steve Riner's
site)
NW End: Jct US 160 in Pagosa Springs
Nationally: E End: Jct I-95 near Midway, Georgia
(1919mi)
Counties: Archuleta
Places: Pagosa Springs, Chromo
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Location: Southern Front Range > Metro Denver >
Northern Front Range
Length*: 127.94mi marked; approximately 309mi total
S End: New
Mexico border at Raton Pass on unmarked overlap with I-25 (link
to Steve Riner's site)
N End: Wyoming
border north of Nunn (link to Andy Field's site)
Nationally: S End: El Paso, Texas; N End: Canadian border near
Fontana, North Dakota (1479mi)
Counties: El Paso, Douglas, Arapahoe, Denver, Adams,
Weld
Places: Fountain, Security-Widefield, Castle
Rock, Sedalia, Littleton, Englewood, Denver, Commerce City, Brighton,
Fort Lupton, Platteville, Gilcrest, La Salle, Evans, Garden City,
Greeley, Eaton, Ault, Pierce, Nunn
NHS:
- I-25 at Castle Rock north to I-25 in Denver
- SH 2 south of I-270 in Commerce City north to US 34 in
Greeley
Freeway: While concurrent with I-76 from Exits 9 to 12.
Expressway:
- Four-lane divided and five-lane undivided from Titan Road south of SH
470 north along Santa Fe Drive to Church Street in
Littleton. Interchange at Titan Rd.
- Six-lane divided with three interchanges from Church Street
north to Florida Avenue in Denver.
- Four-lane divided from I-70 Exit 276A northeast concurrent
with US 6 through Commerce City to I-76 Exit 9. Partial
interchanges at SH 2.
- Four-lane divided from I-76 Exit 12 north through Brighton,
Platteville, and Greeley to the north side of Ault. Interchanges
at SH 7, SH 52, US 34, and BR 85.
Business Routes:
- Fort Lupton
- Platteville
- Greeley
Broken Route:
- Unmarked overlap with I-25 from New Mexico border to I-25 Exit
128 at Fountain
- Unmarked gap from the I-25
overpass at Milepost 137 to Exit 184 at Castle Rock
- Unmarked overlaps with interstates from I-25 Exit 207 in
Denver to I-70 Exit 276A
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Location: South Metro Denver > Eastern
Plains
Length*: 61.46mi
W End: Jct I-25/US 85 Exit 184 in north Castle Rock
E End: Jct I-70 Exit 352 northwest of Limon
Counties: Douglas, Elbert
Places: Castle Rock, Franktown, Elizabeth, Kiowa
Expressway: Four-lane divided around the northeast side of Castle Rock, but with a lower speed limit
Roadway Names: Bypass around the northeast side of Castle Rock is Founders Parkway
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Location: Metro Denver
Length*: 21.73mi total; 18.76mi marked
NW End: Jct US 40-287 interchange at Colfax Ave. and
Federal Blvd. in Denver
SE End: Jct SH 83 at Arapahoe Rd. and Parker Rd. at
Foxfield
Counties: Denver, Arapahoe
Places: Denver, Sheridan, Littleton, Englewood,
Cherry Hills Village, Greenwood Village, Centennial,
Foxfield
NHS:
- Colfax Ave. south to Hampden Ave. (US 285)
- Santa Fe Dr. (US 85) east along Belleview to
I-25
- I-25 east along Arapahoe Rd. to Parker Rd. (SH
83)
Expressway:
- Quasi suburban expressway along Belleview Ave. from
east of Broadway to I-25.
- Six- and eight-lane undivided on Arapahoe Road east
of I-25.
Broken Route: Discontinuous due to an unmarked
overlap with I-25 from Exits 199 to 197.
Roadway Names:
- North-south section: Federal Boulevard
- East-west section west of I-25: Belleview Avenue
- East-west section east of I-25: Arapahoe Road
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Location: Arkansas Valley
Length*: 34.34mi
S End: Jct SH 116 at Lycan
N End: Jct US 50-400 at Holly
Counties: Baca, Prowers
Places: Lycan, Holly
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Location: Western Slope
Length*: 41.72mi; 89.95mi Utah to Montrose
Counties: Montrose
Places: Paradox, Bedrock, Vancorum, Oak Grove,
Montrose
Broken Route: Middle section turned back.
- Western Section
Length*: 33.87mi
W End: Utah border, connecting with UT
46 (link to Dan Stober's site)
E End: Jct SH 141 in Vancorum
- Eastern Section
Length*: 7.85mi
SW End: Intersection of CRs 59 & 90 southwest
of Montrose
NE End: Jct US 50-550 at Main St. and Townsend
Ave. in Montrose
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Location: Central Mountains
Length*: 22.57mi
S End: Jct US 24 north of Leadville
N End: Jct I-70 Exit 195 at Copper Mountain west of
Frisco
Counties: Lake, Summit
Places: Leadville, Climax, Fremont Pass, Copper
Mountain
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Location: Western Slope
Length*: 73.29mi
NW End: Jct US 50 at Crawford Ave. and Main St. in
Delta
SE End: Jct US 50 west of Sapinero
Counties: Delta, Montrose, Gunnison
Places: Delta, Hotchkiss, Crawford, Blue Mesa Dam
Expressway: US 50 at Delta east to the
intersection with SH 65.
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Location: Northwest Metro Denver
Length*: 18.84mi
S End: Jct US 6/SH 58 in Golden
N End: Jct SH 119 in at Broadway and Canyon Blvd.
in Boulder
Counties: Jefferson, Boulder
Places: Golden, Marshall, Boulder
NHS: US 6/SH 58 north to Baseline Rd. (Spur US 36)
in Boulder.
Expressway: Five-lane undivided north of SH 170
into Boulder.
Roadway Names:
- Foothills Road north of Golden
- Broadway in Boulder
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Location: South Front Range > Eastern
Plains
Length*: 85.99mi
W End: Jct US 24 in east Colorado Springs
E End: Jct US 40-287 at Aroya
Counties: El Paso, Lincoln, Cheyenne
Places: Colorado Springs, Ellicott, Yoder, Punkin
Center, Aroya
Roadway Names: 94th Infantry Division Memorial
Highway
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Location: Metro Denver
Length*: 14.32mi
S End: Jct US 285 at Hampden Ave./Sheridan Blvd. in
Denver
N End: Jct US 36 in Westminster
Counties: Denver, Jefferson, Adams
Places: Denver, Lakewood, Edgewater, Mountain View,
Lakeside, Wheat Ridge, Arvada, Westminster
Roadway Names: Sheridan Boulevard
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Location: South Front Range > Arkansas
Valley
Length*: 207.45mi
W End: Jct SH 69 at Main St./6th St. in
Westcliffe
E End: Kansas border east of Towner, connecting with
KS
96 (link to Richie Kenndey's site)
Counties: Custer, Pueblo, Crowley, Otero, Kiowa
Places: Westcliffe, Silver Cliff, Wetmore, Pueblo,
North Avondale, Boone, Olney Springs, Ordway, Sugar City,
Haswell, Eads, Sheridan Lake, Towner
NHS: Where concurrent with US 50 and US 287
Expressway: Where concurrent with US 50 |
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Location: Western Slope
Length*: 4.58mi
S End: Jct SH 141 at Naturita
N End: Main St./3rd Ave. in Nucla
Counties: Montrose
Places: Naturita, Nucla
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