Marsh Interpretive Trail, Columbia National Wildlife Refuge is a 3 mile moderately trafficked out and back trail located near Mattawa, WA that features a river and is good for all skill levels. The trail is primarily used for hiking, walking, nature trips, and birding and is accessible from April until September.
The trail meanders through a diverse wetlands habitat with swallows and various species of shorebirds. In the spring and fall migrating Sandhill Cranes are also abundant. The trail is flat, wide, and ideal for an easy stroll. Late in the summer you may not see any birds; spring, early summer, and fall are the best times to go birding in this area.
3 trails to pick from. All are extremely easy to do, marked very well and maintenance around the trail is well-kept. There is parking for these trails across the gravel road. Dogs are allowed there, as long as they have leashes. We didn't see any rattlesnakes (we went at noon, 93 degrees at the time). I do have to say those horse flies are a pain so please make sure you have proper pants on when hiking. i had leggings on and got bit by them quite a bit. My child on the other hand had on jeans and didn't get bit..
We did the Frog Lake trail and really enjoyed it. Check for ticks!
There are three trails available from where you park your car. We took the three mile option that took us on the ridge and we were able to see all around for miles. It was a well marked trail with informative signs. It was very enjoyable and quiet. Definitely recommend. Only word of warning is the written description of directions is correct while the map and GPS link sends you about 15 miles away.