Gravel on trail in Reston

Watch for sand and gravel in the north lane of the trail under the Sallie Mae bridge at mile 17.5. This section of trail is very close to the unpaved parallel trail and there is no barrier for the loose gravel when there is a heavy rain. It happens frequently and the situation was reported to the park authority quite a while back. They will eventually come out and sweep it clear, but a long term solution is needed. It's a difficult section to fix. In the meantime, it's advisable not to go into that lane at full speed because the sand/gravel is deep.