http://www.maturango.org/janetmuseumpages/deathvalley/How_to_get_here.html**If you're coming from Las Vegas - don't even consider going via I-15 and Baker!- that's the LONG way!
It takes about 2.5 to 3 hours to get to the Valley from Las Vegas and there are several roads which work. Have fun exploring!! You have 2 choices; if you're on the Strip or north of it, *Take Hwy 95 from LV to Beatty, then come to the valley via 374. When you get to the fork downhill from Daylight Pass - if you want to go to Furnace Creek, head left: if you want to go to Scotty's Castle, continue straight down Mud Canyon. 140 miles to FC. Through Beatty, then Hwy 374 into the park. = 140 miles. Allow 3 hrs.
OR - if you're coming from McCarren - the quickest way is Hwy 160, Blue Diamond, through Pahrump (head south on I-15); West on Hwy 160, nice drive up and over the hill to Pahrump Valley. At Pahrump go through on main road all the way through town and then some 3 miles more!, then watch for signs for left turn to Bell Vista Rd, (brown sign, DVNP, and a huge Cell Phone tower) and DV via Ash Meadows. (Don't take the first DV sign you see in town - that's Hwy 178 to Shoshone- much longer) Bell Vista Rd takes you through Ash Meadows and right to DV Junction at the Opera House. Turn right one block, then left to Hwy 190. Boom, you're there. 2.25 hrs., 120 mi. to Furnace Creek Visitor Center if all goes well. For variety, go to DV one way, return to LV the other. :-)
Another route out of Vegas and Pahrump is via Hwy 178 to Shoshone and in Hwy 178 via Badwater. 153 miles, 3.5 hrs. Bottom Line- Hwy 160/Pahrump/Belle Vista Rd/Ash Meadows/DV Junct is fastest.