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Kms Miles
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Wyoming United States #20 Highway Guide

Miles Kms Item Summary
0.0
0.0

Welcome to Wyoming
0.0
0.0
Welcome to Yellowstone National Park
NOTE: For highway travel west via Highway #20 See Highway #20 RV Highway Guide - Section one - West Yellowstone (west gate) to Madison Junction for driving directions.

0.0
0.0
Junction of National Park Highway # 89 & 191 ( Madison Junction )
North to Norris Junction. North to Mammoth Hot Springs Thermal Area. Access to Yellowstone National Park Madison Campground. Madison Campground has 277 campsites, with flush toilets. NOTE Highway # 89 and # 191 0verlap highway #20 at this point.
0.1
0.1
Madison, WY, Yellowstone National Park Picnic Area
West side of highway
0.3
0.5
Point of Information
Crossing the Gibbon River, WY. The Gibbon River flows from Wolf Lake through the Norris area and meets the Firehole River, WY; at Madison Junction to form the Madison River. Both cold and hot springs are responsible for the majority of the Gibbon's flow. Brook trout, brown trout, grayling, and rainbow trout find the Gibbon to their liking. The Gibbon River is fly-fishing only below Gibbon Falls, WY.
0.5
0.8
Access to Fire Hole, WY Canyon Drive
West side of highway. Firehole Canyon Drive, a side road, follows the Firehole River upstream from Madison Junction to just above Firehole Falls. The drive takes sightseers past 800-foot thick lava flows. Firehole Falls is a 40-foot waterfall. An unstaffed swimming area here is very popular in the warmest of the summer season. Cliff diving is illegal.
1.0
1.6
Roadside highway turnout with garbage stand
Paved turout. West side of highway
1.2
1.9
Roadside turnout
Paved no services. East side of highway
1.4
2.2
Roadside turnout
Paved no services. West side of highway
1.7
2.8
Roadside turnout
Paved no services. West side of highway
2.3
3.7
Roadside turnout
Paved no services. West side of highway
2.5
4.0
Roadside turnout
Paved no services. West side of highway
2.5
4.1
Roadside turnout
Paved no services. East side of highway
3.6
5.8
View from highway
Driving south. Looking at the Gibbon River
3.9
6.3
Roadside turnout
Paved no services. East side of highway
4.2
6.7
Roadside turnout
Paved no services. West side of highway
4.3
6.9
Roadside turnout
Paved no services. West side of highway
4.4
7.1
Access to Yellowstone National Park, WY Firehole River Picnic Area
West side of highway. The Firehole River starts south of Old Faithful, runs through the thermal areas northward to join the Gibbon and form the Madison River. The Firehole is world famous among anglers for its pristine beauty and healthy brown, brook, and rainbow trout.
4.6
7.4
Roadside turnout
Large paved no services. East side of highway
4.7
7.5
Roadside turnout
Paved no services. West side of highway
4.9
7.9
Roadside turnout with scenic view area
Paved no services.West side of highway
5.0
8.1
Roadside turnout
Paved no services. Both sides of highway
5.2
8.3
Roadside turnout
Paved no services. West side of highway
5.5
8.9
Access to Fountain Flat Drive
West side of highway.
5.6
9.0
Roadside turnout
Paved no services. Both sides of highway
6.1
9.8
Point of Information
Crossing the Nez Perce Creek
6.2
9.9
Roadside turnout
Paved no services. Both sides of highway
6.2
10.0
Roadside turnout with wildlife view area

6.4
10.3
Roadside turnout
Paved no services.East side of highway. Access to Mary Mountain Hiking Trail. Mary Mountain has two trail heads: Elk and bison can sometimes be seen on this these trails.
6.5
10.4
Roadside turnout with wildlife view area
Paved no services. West side of highway
6.8
10.9
Roadside turnout with wildlife view area
Paved no services. West side of highway
7.1
11.5
Roadside turnout with wildlife view area
Paved no services. West side of highway
7.2
11.6
Roadside turnout with wildlife view area
Paved no services. West side of highway
8.0
12.8
Access to Lower Geyser Basin - Painted Pots Thermal Area, WY.
Walkway Area West side of highway. This large area of hydrothermal activity can be viewed by foot along the boardwalk trail at Fountain Paint Pots and by car along the three mile Firehole Lake Drive. The latter is a one-way drive where you will find the sixth geyser predicted by the Old Faithful staff: Great Fountain. Its splashy eruptions send jets of diamond droplets bursting 100-200 feet in the air, while waves of water cascade down the raised terraces.
8.0
12.8
Lower Geyser Basin Walkway
Photo taken from Painted Pot, WY; walkway area
8.0
12.8
Fountain Paint Pots
Photo taken from walkway area
8.0
12.8
View of Geyser
Photo Taken from Painted Pot Walkway
8.0
12.9
Roadside turnout
Paved no services. Both sides of highway
8.5
13.7
Access to Firehole Lake Drive
East side of highway. Firehole Lake Drive. Great Fountain Geyser - Eruptions average 100 ft, but some visitors are luck enough to see it erupt with rare 200 ft eruptions. Eruptions typically occur every 8-10 hours. During this time the crater fills, and begins to overflow. If the water begins to boil violently, an eruption could occur. For the most part Great Fountain Geyser is dependable.
8.5
13.7

Photos taken of side trip to Great Fountain Geyser Thermal Area, WY.
8.5
13.7
Great Fountain Thermal Area
Looking at Surprise Thermal Pool, WY.
8.5
13.7
Great Fountain, WY, Thermal Area - Pink Cane Geyser
Looking at Pink Cane Geyser. Pink Cone Geyser - Time between eruptions is usually every 6-15 hours. Duration of the eruption can vary from 30 minutes to 3 hours. The average height is 30 ft
8.8
14.1
Roadside turnout
Paved no services. East side of highway
9.0
14.5
Access to Whiskey Flats Picnic Area
East side of highway
9.1
14.7
Roadside turnout
Paved no services. West side of highway
9.4
15.1
Access to Midway Geyser Basin, WY
West side of highway. This geyser basin, though small in size compared to its companions along the Firehole River, holds large wonders for the visitor. Excelsior Geyser reveals a gaping crater 200 x 300 feet with a constant discharge of more than 4,000 gallons of water per minute into the Firehole River. Also in this surprising basin is Yellowstone's largest hot springs, Grand Prismatic Spring. This feature is 370 feet in diameter and more than 121 feet in depth.
9.4
15.1
Access to Midway Geyser Basin
West side of highway. This geyser basin, though small in size compared to its companions along the Firehole River, holds large wonders for the visitor. Excelsior Geyser reveals a gaping crater 200 x 300 feet with a constant discharge of more than 4,000 gallons of water per minute into the Firehole River. Also in this surprising basin is Yellowstone's largest hot springs, Grand Prismatic Spring. This feature is 370 feet in diameter and more than 121 feet in depth.
9.4
15.1
Photo taken from Midway Geyser Basin Walkway
Looking west at the Midway Geyser flowing into the Firehole river
9.4
15.1

Photo taken from Midway Geyser Basin Walkway
9.4
15.1
Photo taken from Midway Geyser Basin Walkway
Looking at the Geyser Basin, WY.
9.4
15.1
Photo taken from Midway Geyser Basin Walkway
Looking at Geyser Blow Hole
9.4
15.1
Photo taken from Midway Geyser Basin Walkway
Looking at Bacteria Pool, WY.
9.8
15.8
Roadside turnout with wildlife view area
Paved no services. West side of highway
10.0
16.1
Roadside turnout with wildlife view area
Paved no services. West side of highway
10.1
16.3
Roadside turnout with wildlife view area
Paved no services. West side of highway
10.4
16.7
Roadside turnout with wildlife view area
Paved no services. West side of highway
10.6
17.0
Roadside turnout
Paved no services. Eastside of highway
10.8
17.4
Access to Fairy Falls
West side of highway
11.0
17.7
Roadside turnout with wildlife view area
West side of highway.
11.3
18.2
Roadside turnout
East side of highway. Access to Mallard Creek Hiking Trail. This trail climbs through lodgepole pine forest (some burned areas from the 1988 fires) and along meadows and rocky slopes before terminating at Mallard Lake.
11.6
18.7
Roadside turnout
Paved no services. West side of highway
12.0
19.3
Roadside turnout
Paved no services. East side of highway
12.5
20.1
Roadside turnout
Paved no services. West side of highway
12.9
20.7
Roadside turnout
Paved no services. West side of highway
13.2
21.3
Access to Biscuit Basin Thermal Walkway Area
Easily accessed by boardwalks less than a mile in length, Emerald Pool, Sunset Lake, Jewel Geyser, and Sapphire Pool are among the features found in these less visited basins.
13.2
21.3
Photo taken from Biscuit Basin, WY Walkway area
Looking at the Mineral Pool.
13.2
21.3
Photo taken from Biscuit Basin Walkway area
Looking at the the Sapphire Pool, WY.
13.2
21.3
Photo taken from Biscuit Basin Walkway area
Looking at a Thermal Pool
13.3
21.4
Point of Information
Crossing the Little Firehole River
13.4
21.6
Roadside turnout
East side of highway. Access to Daisy Hiking Trail
13.5
21.7
Roadside turnout
With access to a Hiking / Bycicle Trail
14.4
23.1
Roadside turnout
Paved no services. Both sides of highway
14.4
23.2
Roadside turnout
Paved no services. West side of highway
14.7
23.7
Access to Black Sands Basin, WY.
Thermal Area
14.7
23.7
Photo taken from Blacksands Basin Walkway area
Looking at the Boiling Hot Springs
14.7
23.7
Photo taken from Blacksands Basin, WY, Walkway area
Looking at The Firehole River with iron runoff from the Black Basin thermal area.
14.7
23.7
Photo taken from Black sands Walkway area
Looking at the Emerald Thermal Pool
14.7
23.7
Photo taken from Blacksands Basin, WY, Walkway area
Looking at the Rainbow Thermal Pool
14.8
23.8
Access to Old Faithfull Geyser, WY Thermal Area
Old Faithful erupts more frequently than any of the other big geysers, although it is not the largest or most regular geyser in the park. Its average interval between eruptions is about 91 minutes, varying from 65 - 92 minutes. An eruption lasts 1 1/2 to 5 minutes, expels 3,700 - 8,400 gallons (14,000 - 32,000 liters) of boiling water, and reaches heights of 106 - 184 feet (30 - 55m). It was named for its consistent performance by members of the Washburn Expedition in 1870. Although its average interval has lengthened through the years (due to earthquakes and vandalism), Old Faithful is still as spectacular and predictable as it was a century ago.
14.8
23.8
Old Faithfull, WY
At it's best
15.2
24.5
Roadside turnout
Paved no services. Both sides of highway
15.5
24.9
Roadside turnout
Paved no services. West side of highway
17.1
27.5
Roadside turnout
Paved no services. West side of highway
17.3
27.8
Roadside turnout
Paved no services. West side of highway
17.6
28.3
Kepler Creek, WY Cascades - View from walkway
Roadside turnout with walkway. Kepler Cascades is the most easily reached waterfall in the district. A marked pullout just south of Old Faithful and a short walk from the car offers the visitor easy access to view this 125-foot cascade.
18.3
29.4
Roadside turnout
Paved no services. West side of highway
18.7
30.1
Roadside turnout
Paved no services. West side of highway
18.9
30.4
Roadside turnout
Paved no services. Both sides of highway.
19.4
31.3
View from highway
Driving south.
20.1
32.4
Scamp Lake Roadside Turnout
Paved no services. East side of highway
20.3
32.7
Roadside turnout
Paved no services. West side of highway
20.8
33.4
Roadside turnout
Paved no services. Both sides of highway
21.1
34.0
Roadside turnout
Paved no services. East side of highway
21.7
35.0
Roadside turnout
Access to Devide Hiking Trail
22.7
36.5
Roadside turnout - View from turnout
Paved no services. West side of highway
22.8
36.7
The Continental Divide
Roadside turnout. Elevation 8262 feet
23.2
37.4
Roadside turnout
Paved no services. West side of highway
23.7
38.1
Roadside turnout
Paved no services. West side of highway
23.9
38.5
Belace Creek Roadside turnout

24.0
38.7
DeLacy Roadside turnout picnic area
DeLacy picnic area has 9 picnic tables with toilets
24.5
39.4
Point of Information
Shoshone Lake, west side of highway.
24.5
39.5
Roadside turnout
Paved no services. West side of highway
24.7
39.7
Roadside turnout
Paved no services. East side of highway.
25.2
40.5
Roadside turnout
Paved no services. East side of highway
25.2
40.6
Roadside turnout
Paved no services. West side of highway.
26.6
42.8
Roadside turnout
Paved no services. West side of highway
27.3
43.9
Roadside turnout
Paved no services.Both sides of highway.
28.0
45.1
View from highway
Driving south
28.6
46.0
Continental Divide - Roadside turnout
Paved no services. Both sides of highway
28.8
46.4
Yellowstone National Park, WY. Divide Picnic Area
Roadside turnout. East side of highway. Divide Picnic Area has 14 picnic tables, with toilets
29.5
47.5
Roadside turnout
Paved no services. Both sides of highway.
30.4
49.0
Roadside turnout
Paved no services. West side of highway
30.6
49.3
Roadside turnout
Paved no services. East side of highway.
32.0
51.5
Roadside turnout - View from turnout
Looking at West Thumb of Yellowstone Lake, WY.
32.1
51.7
Roadside turnout
Paved no services. Both sides of highway.
32.6
52.4
Junction of National Parks Highway U.S. #191 & U.S.#89
Yellowstone National Parks community of West Thumb. South to community of Grants Village, WY; access to campgrounds. South to Yellowstone National Parks South entrance & Grand Teton National Park, WY, Bridger -Teton National Forest, WY. Note overlap of highways # 89 & #191 end at this point and head south. For continuance of highways 89 and 191 see Milebymile.com Wyoming - Yellowstone National Park to Pinedale, and Pinedale to the Wyoming / Utah state line. For continuance of highway # 20, see Milebymile.com, Section 3 West Thumb to Yellowstone National Park, East Entrance. Start / Finish of Highway Travel Guide. -e9