Eisenhower Pass, also known as Straight Creek Pass, is a high mountain tunnel system in the Colorado Rockies, passing under the Continental Divide. The Eisenhower Summit is located on Interstate 70, approximately 9 miles east of Dillon, Colorado. I-70, on both sides of the Eisenhower Tunnel system, has a steep descent. Eisenhower Pass is one of three steep grades on I-70 between Denver and Utah, with Vail Pass to the west and Floyd Hill to the east. Eisenhower Pass receives a large amount of snow in the winter and often has chain restrictions for commercial trucks.

Westbound I-70 from the Eisenhower Summit has a vertical descent of 2,294 feet over a distance of 8.6 miles. The westbound descent begins just after exiting the tunnel. The reported grade for the westbound descent is 7% for 7 miles. The grade is steady for approximately 6.4 miles, where it lessens to a 5% to 6% grade for the next 2.2 miles. I-70 transitions to an upgrade 8.6 miles west of the summit, or just past the 205 exit for Dillon, Colorado. Trucks experiencing brake fade are warned not to exit at the Dillon exit and are instructed to continue to the upgrade.

Eastbound I-70 from the Eisenhower Summit has a vertical descent of 2,515 feet over a distance of 14.5 miles. The eastbound descent begins after entering the tunnel, where a reported 1.6% downgrade is encountered. After exiting the tunnel, the grade steepens to a reported 5% to 6% for 12 miles. About four miles east of the summit, the Loveland Pass/U.S. Highway 6 bypass traffic merges onto I-70. The descent is stepped with grades varying from 5% to 6%. There is a steep grade section 12.1 miles east of the summit, before the grade flattens in the area of Georgetown (the 228 milepost). However, there is a continued lesser descent to approximately the 243 milepost before an uphill transition is encountered at Floyd Hill.

Pass Name:	Eisenhower Tunnel
Traversed by Highway:	I-70
Summit Elevation:	11,158 ft
Summit Conditions:	Large pullout area on east and west side of tunnel for westbound traffic. Large pullout area on west side of tunnel for eastbound traffic
Summit Milepost:	213

Base Elevation:	8,864 ft
Vertical Distance:	2,294 ft
Base Milepost:	205
Driving Distance:	8.6 miles from summit
Posted Speed Limit:	60 mph / Trucks over 15 tons, 30 mph
Steepest Reported Grade:	7% for 7 miles
Calculated Average Grade:	5% for 8.6 miles
Lowest Advisory Speed:	None
Number of Lanes:	Three westbound
Number of Switchbacks:	None
Number of Advisory Curves:	None
Runaway Ramps:	One on right at 1.9 miles west of summit. One on right at 4.8 miles west of summit.
Number of Brake Check Stations:	One on west side of tunnel
Number of Required Stops:	None

MAXIMUM TRUCK WEIGHT (POUNDS)	MAXIMUM SAFE SPEED (MPH)	BRAKE TEMP FROM DECLINE (°F)	BRAKE TEMP FROM EMERGENCY STOP (°F)	TOTAL BRAKE TEMP. (°F)	TOTAL TRAVEL TIME (MIN.)
80,000	20	482	9	491	25.8
75,000	24	481	13	494	21.5
70,000	30	471	19	490	17.2
65,000	32	474	20	494	16.1
60,000	60	424	67	491	8.6
*These speeds are based on an average grade from the summit to the base. Some grade segments may be steeper than the average and require a slower speed.

Base Elevation:	8,643 ft
Vertical Distance:	2,515 ft
Base Milepost:	228
Driving Distance:	14.5 miles east of summit
Posted Speed Limit:	65 mph / Trucks over 35,000 lbs, 45 mph
Steepest Reported Grade:	5% and 6% for 12 miles
Calculated Average Grade:	3.2% for 14.5 miles
Lowest Advisory Speed:	None
Number of Lanes:	Two Eastbound
Number of Switchbacks:	None
Number of Advisory Curves:	None
Runaway Ramps:	None
Number of Brake Check Stations:	One on west side of tunnel
Number of Required Stops:	None

MAXIMUM TRUCK WEIGHT (POUNDS)	MAXIMUM SAFE SPEED (MPH)	BRAKE TEMP FROM DECLINE (°F)	BRAKE TEMP FROM EMERGENCY STOP (°F)	TOTAL BRAKE TEMP. (°F)	TOTAL TRAVEL TIME (MIN.)
80,000	45	449	50	499	19.3
75,000	60	368	83	451	14.5
*These speeds are based on an average grade from the summit to the base. Some grade segments may be steeper than the average and require a slower speed.