Understanding it's closed due to sewer line infrastructure work.  Anyone have details?

For one with a fondness for the northern trails, it is possible to bypass the Tortuga closure by hopping off of Figure 8 at where it comes close to the field parking lot that I believe it is primarily reserved for employees and then riding the new Field Trip loop located under the power lines until this can drop you back off at where Tortuga and Academy intersect.  From here, you can continue on to the out portion of Thread.  One could also opt for Academy in place of Field Trip.  I just finished Figure 8 last Sunday since Tortuga was closed and then rode much of it again so that I could jump off into the field parking lot and make my way further north as described above.  In case you are wondering, Tortuga is closed on both sides of the gravel road that it crosses, so you can't jump back on from this as I had hoped.