Curtis,
Here is an approximate elevation profile of the minimum Outer Mountain Loop hiked west (Laguna Meadows/Blue Creek) to east (Juniper Canyon/Pinnacles), minus any side trips, including to the South Rim. The mileage is short by several miles, but the approximate elevation is close enough to give you an idea.
Actually, the profile looks smoother than the actual trail, which has many ups and downs that look awful smooth here.
Based on the mileage on the profile AND NOT ACTUAL MILEAGE, the following is roughly the hike:
0-3.5 miles -- climb Laguna Meadows trail to LM
4.25-9 miles -- descend Blue Creek Canyon to Homer Wilson Ranch
9-11.5 miles -- Dodson Trail climb to high saddle
11.5-19 miles -- various ups and downs along Dodson Trail heading east
19-22.5 miles -- gradual climb into Juniper Canyon
22.5-26 miles -- steep climb up Juniper Canyon
26-27.5 miles -- Boot Canyon
27.5-30.5 miles -- descent down Pinnacles Trail
Again, the mileage is off. Don't rely on the trail mileage. Consult Parent's book instead for mileage waypoints. The profile should just give you a good sense of the ups and downs, and the "mileage" listed above simply indicates the various stretches of the route. If I wasn't clear, DON'T RELY ON THE MILEAGE.
My OML trip went as follows:
Day 0: Cache food and water 1/2 mile southeast of Homer Wilson Ranch along Dodson Trail
Day 1: Hike LM trail around SW rim to SE 2.
Day 2: Hike east and northeast rim, descend Juniper Canyon trail to zone campsite 1 mile WNW of Juniper Canyon TH.
Day 3: Hike western portion of Dodson Trail, water at Fresno Creek, zone camp 1 mile E of Dodson summit
Day 4: Finish Dodson Trail, lunch at Homer Wilson Ranch after picking up cache, zone camp in Blue Creek Canyon near the spring
Day 5: Hike back into Chisos, camp at SW3.
Day 6: Hike to Basin Trailhead via Boot Canyon and Pinnacles Trail.
A complete trip report begins
here.