Traffic will be impacted from 6:30am-1:30pm
PLAN AHEAD and USE ALTERNATE ROUTES around the race course.
Expect 15-30 minute delays if you cross into the designated center area of the racecourse.
When leaving your neighborhood from inside the racecourse onto Flintridge or Lake Woodlands Drive, expect delays.
Add 10-15 extra for your travel times.
Map your own drive route prior to race day.
Email or call with questions if you are unsure.
RECOMMENDED COMMUTE AND DRIVING PRACTICES DURING THE EVENT:

Only residential traffic is recommended through and around the racecourse during the hours of 630am and 130pm.
Travel routes that are OPEN:
Northbound
Kuykendahl 9:30 am-130pm
Woodloch Forest 7am-1130am
FM 2978 7am-130pm
I-45 7am-130pm
Southbound
Woodloch Forest 7am-1130am
FM 2978 7am-130pm
I-45 7am-130pm
Westbound
Research Forest Drive 7am-130pm
Lake Woodlands Drive (westbound) 7am-130pm
Eastbound
HWY 242 7am-130pm Open
Woodlands Parkway 7am-130pm Open
Businesses and neighborhoods will be accessible during the race.  
NOTE: Eastbound Lake Woodlands Drive will have all lanes closed between 630am-10am from Kuykendahl to Lake Front Circle.   One lane will open for eastbound traffic approximately 10am.  

Lake Woodlands westbound will have contra flow. Vehicles will be traveling east and west from Lake Front Circle will be traveling both directions – east and west.

Source: Woodlands Marathon