From the exit on I-70 for Silverthorne, (#205) head south on US HWY 6 (aka: Blue River Parkway). The highway north of the interstate becomes State Highway 9, but south of the interstate it's US 6. Drive south and east along US 6 to Keystone, passing several arms or bays of Lake Dillon. As you come to the Keystone Ski area, watch for a right hand turn onto Montezuma Road. The road goes briefly south, passing by some of the parking for the ski area, then heads east and follows along the Snake River. At about 4.6 miles from the turn off US 6, watch for the road to make a sharper left, then right turn. At that right hand turn, FR 260 turns off for Peru Creek. Stay on the Montezuma Road and reach the town after 7 miles from US 6.
From the center of town, continue south another 1.2 mile. Turn LEFT onto the Webster Pass Road. (This may also be identified at least on Google Earth as "Bullion Mine Road." Also, several internet sources have repeated the same error saying the turn off is to the right.) Coordinates for this intersection are: N 39° 34' 04.43" W 105° 51' 37.28". The first .7 mile takes you SE through forest with still several homes/cabins. Be careful not to take any turns into private drives or to double back direction at any point. At .7 mile, there will be a seasonal gate. You may find this closed and locked in the earlier part of the summer. Beyond the gate, the road gets rougher, soon passing through the bottom end of a large rock-talus area. Beyond there, the road continues in mostly open terrain past potholes, mudholes, etc. to a place where it crosses to the west side of the Snake River (now just a creek.) There is parking at a spot just before the creek crossing and possible at-large camping nearby as well. Attempts to drive beyond here will take you onto the more rugged 4WD section of the Webster Pass Road.
If not equipped with a higher clearance vehicle, then from the center of Montezuma, continue driving south for 1.5 mile to a road fork where the main road heads right to cross Deer Creek. There is a large parking area before the creek crossing. From here you can begin walking up to the Webster Pass Road which is uphill to the NE. A lesser road/trail leads up to make the connection. At all points, there is an abundance of private property all around Montezuma. Please respect postings and do not attempt to camp near those properties. Starting from this point will add 1.6 miles one-way or 3.2 miles RT to the overall hike and another 475 ft. in elevation gain if doing the Geneva-Santa Fe route.
Weekend camping anywhere around Lake Dillon can be problematic. Too many Front Range visitors and too few campsites. In the general Dillon area, try this website for some help: http://www.townofdillon.com/visit/camping-info
There are some primitive campsites up along Peru Creek. There appears to be room for some primitive camping at our trailhead coordinates. There also appear to be several primitive sites located up the Deer Creek Road (still CR 5) after crossing Deer Creek and driving south up the road (if you can get up it). Please be aware of and respect all private property postings.