Visited here today with my husband. I have been a few times before in years past but not for several years. This refuge is a great place to see birds and get some exercise. There are a number of paths/trails that wind through this large refuge and people enjoy walking, jogging and biking. I noticed a number of families with children and the kids seemed to have a good time running around playing. The refuge is located right next to the Dumbarton Bridge on San Francisco Bay. Pathways wind along the bay and marshlands with bridges crossing the sloughs. This is a remarkable place because it is an urban refuge and is a very important place for migrating waterfowl. Cars are crossing the Dumbarton Bridge and the surrounding cities are close by but the traffic noise does not seem to detract from the peace and beauty of this place. I came here for birdwatching and was not disappointed. There were a number of shorebirds and waterfowl, as well as birds of prey. Be sure to bring binoculars and spotting scope if you have them for easier viewing. There are benches all along the paths so you can stop and relax. We so enjoyed the fresh breezes coming off of the bay. The refuge features a small visitor center with some exhibits and books for sale. There are also some guided walks offered if you check their website. We walked at least a few miles, looked at the wildlife and enjoyed the weather. This made for a great day. The access is easy (off Hwy. 84 and Thornton Road near the cities of Newark and Fremont). There is plenty of parking. If you get the chance come see this wildlife refuge in the city!