This multi-use trail extends northwards from Lake Meridian Park in Covington, towards Renton. The "main" trail surface is paved, but a very nice soft-surface trail for equestrians meanders along beside it, sometimes close and sometimes not, for much of its length.
The big attraction for this trail is the natural scenery. Since the trail follows the creek valley, there are wetlands on all sides that attract abundant bird life at all times of the year. Local birding groups often lead guided walks here, including nighttime owl "listens".
Two places have enough room to park a horse trailer, though the first wasn't really designed for it:
Soos Creek South Trailhead, on 148th Ave SE across from SE 266th St. From Kent, drive east on Smith Street up the hill. Stay to the right after going through the Benson Road (104th Avenue SE) intersection. The road becomes Kent- Kangley Road. Follow Kent-Kangley Road east toward Covington. Go past Lake Meridian Park and turn left on 152nd Ave SE, continue 1/4 mile (name changes to 148th Ave SE) and look for the trailhead parking lot on the right. There is no "official" trailer parking space here, but often you can find room in one side of the lot or the other.
Soos Creek Trailhead, further north on 148th Ave SE just south of the intersection with SE 249th St. Gravel lot; there should be plenty of horse trailer room if people parked nicely. A spur trail leads to the main trail.
There is a parking lot and trail access at Gary Grant Park at SE 208th and 137th Ave SE, but the lot is small and usually full of other cars, and horses aren't welcome on the lawns there.
Open
Length: 7.62 miles
Surface: dirt/gravel; must join paved path in northern sections if you want to ride the full length of it
Share with: walkers, joggers, bicycles, dogs
porta-potties
Parking for: 1-3 trailers at
South Trailhead if other cars haven't parked inconveniently; 4-5
trailers at the other Trailhead.
King County Parks:
King County Parks - Soos Creek Trail page
Map: Soos Creek appears on the Regional Trails Map put out by King County Parks.