Route Inventory Data Summaries: 7/12/05
Area: Dexter Canyon
Observers: Chris Kassar & Mike Klapp
Wild Horse Meadows
Routes
Quad: Dexter Canyon
Documentation on Maps/Guides:
| 1988
Inventory (black) |
2003
Inventory
(yellow) |
2003
Inventory
(green) |
USGS 7.5
Quad |
Inyo
Recreation Map |
None |
| |
yes |
|
no |
no |
|
| Other
Listings |
| Mammoth Lakes Area OHV
& Mountain Biking Map |
Shows a route adjacent to
Wild Horse Meadow, though not listed as a loop. These specific routes
are not shown on the map. |
| Eastern Sierra's Best
100 Mountain Biking Trails by Reanne Hemingway Douglas, Mark Davis
& Don Douglass |
Mountain bike route called
the Sagehen Summit Loop is listed as going by Wild Horse Meadows, but
not directly along those routes. |
Route description: Spur
routes (N675, N27870, N2781, Z2673, Z2674, and N2841) off of Z153 that form a
north and south loop through the meadow (Pictures 712003,
712004).
Narrative summary: Sandy and wide. Low to moderate
use. Routes are not very clearly defined (Pictures 712009,
712010). Motorcycle,
mountain bike, pedestrian and full-size vehicle tracks. Begins to pass through a
meadow (Picture 712008), but then is closed to prevent further damage to the
meadow (Picture 712006). Closure appears effective. Portion that crosses through
the meadow leads to loss of vegetation and increased mud. Little to no
vegetation in the center of the route; the meadow area where there is no route
is densely vegetated. Camp site with fire ring (Picture 712007) and signs of
wood harvesting present (Picture 712005). Lodgepole pine trees are dominant
vegetation; grasses found along route. Significant potential for proliferation
off of this route because it crosses through open country.
Deer seen on route.
Recommendation: The purpose of this route is unclear. There are
signs that users come to the area to harvest wood and/or to camp. Most of this
route is adjacent to the meadow and does not seem to cause direct resource
damage to riparian habitat. The routes in the area are difficult to follow and
may benefit from more clear designations (i.e. signing). It may be advisable to
close these routes due to proliferation and potential for impacts on the meadow,
they are not the highest priority in terms of resource damage.
Route Z707
Quad: Dexter Canyon
Documentation on Maps/Guides:
| 1988
Inventory (black) |
2003
Inventory
(yellow) |
2003
Inventory
(green) |
USGS 7.5
Quad |
Inyo
Recreation Map |
None |
| yes |
|
|
yes* |
no |
|
*shown as 4WD route
Route description: Route
begins south of Wild Horse Meadow off of Z153 and heads south and west following
Dexter Canyon (Picture 712012).
Narrative summary:
Sandy and steep, follows canyon
(Picture 712013). Well defined route. Low to moderate use. Motorcycle and
full-vehicle tracks. Little to no vegetation in the center of the route.
Sagebrush and riparian vegetation (i.e., willows, aspens, cattails) are dominant
vegetation (Picture 712015); yellow
monkeyflower, sulfur buckwheat, lupine
prevalent along route. Proliferation potential due to surrounding open terrain
(Picture 712019). Turkey vulture, coyote scat, deer prints, yellow warbler and
raven seen along route.
Route passes directly through
critical riparian habitat with 2 creek crossings and 1 meadow crossing. Route
Z707 crosses with Z2712 providing alternate, dry access to Crooked Meadows
(Picture 712022).
Creek Crossing #1: Unstable because the banks of the creek are steep
at the entrance and exit of the route from the creek allowing for erosion and
sedimentation. 90 degree crossing with evidence that the crossing is increasing
in size (Picture 712014). Width at the crossing is 3 feet. Width above and below
is 2’ 8”. Water depth at crossing is 1 inch. In the crossing, there is
emergent riparian vegetation (rushes, sedges, cattails) and significant aquatic
insects, including leeches.
Creek Crossing #2: Unstable,
90 degree crossing (Picture 712016). Width at the crossing is 8 feet. Width
above and below is 29’ (Picture 712017). Water depth at crossing is 6 inches.
There is emergent riparian vegetation (rushes, sedges, cattails) and significant
aquatic insects in the crossing. There is a significant amount of gullying
causing bank cut depths of 8 to 12 inches (Picture 712018). The potential for erosion,
sedimentation and increased turbidity in the creek is great due to the gullying
and because of the surrounding steep terrain allowing for run-off into the
creek.
Meadow Crossing #1: Unstable, low angle (Picture 712021). Total
length of the meadow crossing is 90 feet; 40 feet of that contains standing
water. There is emergent riparian vegetation, including rushes and sedges,
aquatic insects and Pacific Tree Frog tadpoles.
Whorled penstemon and killdeer present.
Recommendation: Manage for non-motorized use from junction of Z707
with 01S17 to junction of Z707 with Z153. Making this route a
hiking trail will decrease the current damage to critical riparian habitat.
Consider developing a non motorized, non mechanized trail further down Dexter Canyon. If this is
not possible, we recommend mitigating the creek crossings and meadow crossing,
by developing alternative routes around these areas or closing them (i.e. creek
crossing #2) completely.
Route N683
Quad: Dexter Canyon
Documentation
on Maps and Guides:
| 1988
Inventory (black) |
2003
Inventory
(yellow) |
2003
Inventory
(green) |
USGS 7.5
Quad |
Inyo
Recreation Map |
None |
| |
yes |
|
no |
no |
|
Route description: Route
off of Z705 heading north.
Narrative summary:
Undefined and difficult to find
and follow. Low use. Full-size vehicle tracks. Sparse vegetation in the center
of the route with a maximum height of 6 inches. Passes through lodgepole pine
forest. Significant proliferation
off of route (Picture 712027). Ends abruptly (Picture
712028).
Recommendation: The purpose of this route is unclear. We recommend
closing it and leaving it off of the inventory and designation because the route
is unclear and is leading to a lot of proliferation of off-route tracks.
Route N2788
Quad: Dexter Canyon
Documentation on Maps/Guides:
| 1988
Inventory (black) |
2003
Inventory
(yellow) |
2003
Inventory
(green) |
USGS 7.5
Quad |
Inyo
Recreation Map |
None |
| |
yes |
|
yes* |
no |
|
*only the first 1/4 mile is shown (as 4WD route)
Route description: Spur
off of the Ford Springs Road (Z713) heading south and east (Picture 712029).
Narrative summary:
Not very well defined route. Low
use. No recent tracks or sign of use. Significant vegetation in the center of the
route with a maximum height of 1 ½ feet (Picture 712030). Sage brush and aspen
are dominant vegetation. Bitterbrush, lupine, sego lily, paintbrush are abundant
along the route. Deer tracks present. Route
deteriorates and ends (Picture 712031).
Recommendation: The purpose of this route is unclear. We recommend
leaving it off of the inventory and designation because the route is unclear and
appears to get little to no use.
Main
Dexter Canyon map Glass Mountain Map
River Springs Map Glass
Mountain Narrative River
Spring Narrative