I think you need a map based solution to do what you want or something which offers straight-route navigating to a specific point/POI/start.

TomTom Multisport Watch Strap (Orange) TomTom Multisport Watch Strap (Orange)

I’d say the best option would be to keep hold of your phone and go for one of other TomTom Spark watches or something like Fitbit Surge, the Garmin Vivoactive or even the Polar M400.You could go down the very bulky smartphone route but that must get awkward in cardio classes and you would have to purchase an app and a HRM such as the Scosche RHTHM or MIO Link. You can plan interval sessions, or set the Spark 3 to buzz every time you stop running at a certain pace or exit a given heart rate zone. I’d hoped the Apple Watch Series 2 would be a winner: i t’s got GPS, a heart-rate monitor and on-board storage, but it’s hardly the perfect running companion. The monochrome screen is clear and helps with light or dark viewing at a glance, which is ideal for running. It's a little more slick now, scanning available playlists on your computer, but we wish there was an easier and less fiddly way to cram your tunes onto the Spark 3.

TomTom Spark 3 Multi Sport GPS Fitness Watch - Large Strap TomTom Spark 3 Multi Sport GPS Fitness Watch - Large Strap

If you’ve splashed out on the top-end model then using the GPS, heart-rate and music streaming features all at once will cut that down to around five hours, but that should still be enough to get you through a marathon if that’s your masochistic bag. For a flat 5k this doesn’t make a difference, but you can imagine courses beginning with large climbs for example, and it would be disheartening to feel like you can’t catch up. The ability to stream music from your watch without your phone continues to be a feature that gets overlooked by the likes of Garmin and Polar (although that has been remedied with the new Polar M600 Android Wear running watch). We tested it against a Wahoo Tickr chest strap and it was impressively accurate even during interval runs, giving an average heart rate just a couple of beats per minute different to the Tickr at most. This apparently has to do with the position of the Bluetooth antenna in the headphones in relation to the watch.I was hoping to keep it simple by just dragging the files across to the watch when it appeared as a drive in Windows. What you get with Spark 3 is a responsive and relatively lag-free experience that means you can effectively and reliably manipulate your heart rate to the right zone during your training – and that's what it's there for. I found the average heart rate readings and heart rate zone training to be consistent with the H7 heart rate monitor chest strap, which I’ve found to be the most accurate monitor I’ve used. A let-down on the Spark is the automatic sleep tracking, which we found to be pretty inaccurate, and it doesn’t provide the breakdown of sleep states found on other trackers. You won’t get cycling-specific stats like cadence or power, but the GPS ensures you get distance, elevation, speed and splits.

TomTom Spark 3 Music, compatibility, battery life and apps - TomTom Spark 3

While the TomTom Spark 3 can track daily activity and is super-easy to use and read while training, it won’t offer smartphone notifications.The TomTom Spark 3 can track treadmill sessions, indoor and road cycling, swimming, freestyle and gym sessions, but in truth it’s all about road running.

TomTom Spark 3 review - Wareable

The watch does a fantastic job of tracking these activities using the built-in GPS chip and heart rate monitors. It also uses the same charger, which we're not the greatest fans off, but it's not going to budge from that cradle when you need to power it up. Since TomTom revamped its companion app it's been a much nicer place to view workout data including activity tracking and it's added features like the ability to view workout trends.

You will see the odd outage, perhaps twice in a two hour run, but this is absolutely a problem with chest straps as well.