Hi Laing,
Hey, that's my backyard. :)
I'm just a bit north of you, and I ride this trail pretty frequently. There are a few other entrances (for bikes and hikers) other than the refuge headquarters - north of it, there's a gate that connects you to a dirt road in the southern reaches of Wellington. If you head south, there's the Loxahatchee boat ramp (and more, I think the levee trails will take you all the way down into Miami/Homestead). You can also loop all the way around the refuge, for a total of about 75 miles.
The alligators are mostly dormant right now with the cooler weather, but I think you'll start seeing them more soon. There are deer out here, too, usually in the morning foraging in pairs. I realize deer aren't noteworthy in the rest of the country, but I had never seen a single one down here at all until I started riding on these type of trails, and now I see them about once a month on my rides. Sometimes when they see me, they run off in the direction the trail, and I try to keep up.
Our scenery definitely doesn't have the visual impact of, say, the Rockies, but one thing to appreciate about the Everglades is that it's a totally unique ecosystem, and so much of it has been destroyed. Riding here, just a few minutes from modern developed suburbia, you can still get a little glimpse into what Florida used to be. Plus, like you mentioned, it's much lower-stress than the road riding we have.
There are other trails like this you can visit in the area. I've found the heat maps from Ride with GPS and Strava (
https://ridewithgps.com/heatmap and
https://ridewithgps.com/heatmap, respectively) really helpful to see what's accessible to bikes, and what connects to what, based on where other people are riding.
- Andrew