- Mayflower Spring to Marshall Lake Trailhead
- 17.8 miles
Southern Access Point: Mayflower Spring
- GPS Coordinates: 34.96637° N, 111.48621° W
From Flagstaff, take the Lake Mary Road exit (339) off I-17 for ~20 miles, then turn right (west) on Mormon Lake Road (Highway 90). Follow this about 3 miles to an unmarked turnoff on the right. This two-track dirt road leads to Mayflower Spring (~0.4 miles).
Northern Trailhead: Marshall Lake Trailhead
- GPS Coordinates: 35.11125° N, 111.54138° W
From Flagstaff, take the Lake Mary Road exit (339) off I-17 for 9 miles, then turn left (east) on FR 128 at the sign for Marshall Lake. Pass the observatory turnoff, then at 2.2 miles turn left before Marshall Lake (more of a marsh) and park at the AZT sign on the left. If you are coming from the south on Lake Mary Road, the Marshall Lake turnoff is 7.5 miles north of Pine Grove Campground.
Trail Route Description
From Mayflower Spring the trail heads north and then turns to the east and joins up again with the old railroad bed. It crosses FR 132 and then just south of Railroad Tank the trail turns to the east and works its way over to FR 651, which is the entry to Pinegrove Campground. It crosses Highway 3 and climbs up past the Horse Lake Trailhead. It turns to the north and crosses Anderson Mesa, and then passes Horse Lake. It follows a two-track, turns to the west, and becomes a trail again. After crossing FR 129 the trail passes Vail Lake and Prime Lake, and then skirts around the Lowell Observatory. It passes by a trailhead near the observatory, then heads north and then west to Marshall Lake.
- Spring, Summer and Fall
- Current weather forecast
Water can usually be found at some of the stock tanks along the route. There is seasonal water in some of the drainages the trail crosses.
- All water along this passage should be purified prior to use.
- USGS Topographic Maps: Ashurst Lake and Lower Lake Mary.
- Coconino National Forest – Visitors Guide.
- Coconino National Forest – Recreational Opportunity Guide.
- Coconino National Forest map.
- BLM Information Center maps.
For more information
- The Passage Steward
- Coconino National Forest, Flagstaff Ranger District, 5075 N. Hwy 89, Flagstaff, AZ 86004 (928) 526-0866.
- BLM Information Center (602) 417-9300.
Current Passage Info
Photos from the Arizona Trail Association’s Flickr galleries, for this specific passage. View the entire Flickr account.