New Boat GPS
Lake Lanier boat GPS and depth chart
Free in your browser: depths at today’s lake level, routes that steer around the shallows and the Corps’ hazard buoys, and turn-by-turn directions on the water. No app, no account, no ads.
Built for this lake, at today’s level
Most boating maps show Lake Lanier at full pool. This one starts from the U.S. Army Corps of Engineers’ survey data and lowers every depth by how far the lake is down today, straight from the USGS gauge at Buford Dam. When the lake drops, the shallows grow on the map and the routes change with them.
Depth at today’s level
The whole lake shaded by estimated depth, with depth contours and chart-style depth numbers as you zoom in. Water under your hazard depth is striped red. Tap anywhere for the depth there.
Routes around the shallows
Pick a marina, ramp, cove, restaurant or any spot on the map. Routes stay out of water shallower than you set, miss the Corps’ low-water hazards and keep-out zones, and slow down for no-wake zones. Quickest or scenic, with stops.
Turn-by-turn on the water
Full-screen chartplotter view with the next turn, speed, heading, estimated depth, distance and arrival time. Spoken directions, warnings before shallows, hazards and no-wake zones, and automatic rerouting.
Bridges and power lines
Enter your boat’s height and it checks clearance under every bridge and overhead power line on your route at today’s level.
Anchor alarm and man overboard
Set an anchor drag alarm with the radius you want. One tap marks a man-overboard spot and steers you back to it.
Share my trip
Send family a live link with your position, route and ETA. Name a contact and set a back-by time: if you haven’t ended the trip by then, they get an email with your last position.
Fuel, wind and sunset
Fuel and cost for the trip from your boat’s burn rate, a reserve warning, gusts in the next few hours, and a heads-up when you’d arrive after sunset.
Track, spots and GPX
Record your track, save fishing holes and favorite coves, find the nearest marina, ramp or food by water, and save everything as a GPX file for your Garmin or other apps.
Keeps working on the water
Once you’ve opened it, the page, the lake data and the map you looked at keep working when the signal fades in the coves.
Plan at home, go on the water. Plan a trip on your computer, tap Share trip, and open the link on your phone at the dock.
Plan a tripQuestions
Is there a depth map of Lake Lanier at today's water level?
Yes. The Boat GPS shades the whole lake by estimated depth at today's level, read from the USGS lake gauge, and draws depth contours and depth numbers as you zoom in. Water under your hazard depth (3 feet unless you change it) is striped red. Depths are estimates from U.S. Army Corps of Engineers survey data: use them to plan, and keep watching your depth finder.
Does it work on my phone on the water?
Yes. Open this page in your phone's browser, allow location and tap Go. You get turn-by-turn directions, speed, heading and estimated depth full screen, and the screen stays on. Once opened, the page, the lake data and the map you looked at keep working with a weak signal. No app to install.
How does it pick a route?
It finds a water route that stays out of water shallower than your hazard depth wherever there's a way around, steers clear of the Corps' marked low-water hazards and keep-out zones, and slows to idle in no-wake zones. Set your boat's draft, height and cruising speed under My boat, then pick the quickest or a scenic route.
Can my family follow my trip?
Yes. Share my trip gives you a link that shows your position, route and ETA live. If you name a contact and you haven't ended the trip by your expected-back time plus a grace period, they get one email with your last position. The link stops working when you end the trip, and trip data is deleted 7 days later.
Can I use it with my Garmin, Navionics or other apps?
Yes. Save as GPX (under On the water) downloads your track, your planned route and your saved spots as a GPX file that chartplotters and most boating and fishing apps can import.
Is it free?
Yes. Free, with no account and no ads. Your settings, saved spots and track stay in your browser.
Before you go: check today’s lake level and forecast, which boat ramps are open at this level, and the Lake Lanier safety guide.
For reference, not for navigation, and not a substitute for charts, your depth finder or local knowledge. Depths are estimates from U.S. Army Corps of Engineers survey points and today’s USGS lake level, not a survey of the bottom, and can be off by 10 ft or more. Clearances are approximate, and hazard buoys move or go missing. Keep a lookout, follow buoys and posted signs, watch your depth finder and wear a life jacket.