Garmin ForeRunner 255 GPS Fitness Running Watch | Grey

Tune Your Training

Add a beat to your step. Get the training and recovery insights you need to run at a higher level - plus music to motivate you along the way.

Get an overview of your sleep, HRV status and daily workout with your morning report.

Charge less, train more with up to 14 days of battery life in smartwatch mode and up to 30 hours in GPS mode.

Push your limits with a built-in triathlon feature and 30+ activity profiles.

Plan your strategy with daily suggested workouts, course details and more on the race widget.

Utilise a full suite of advanced metrics and training tools to reach your goals.

Pay for your post-workout coffee with Garmin Pay contactless payments[1]. - and listen to music on the go.

Ready for the Long Run

Get an uninterrupted picture of your daily health and nightly sleep with up to 14 days of battery life in smartwatch mode and up to 30 hours in GPS mode.

(Almost) as Light as a Feather

With its sleek design and 49g weight, you'll almost forget you're wearing Forerunner 255 Music - even when you're asleep.

Sweat-Ready Materials

Featuring easy-to-use buttons and a silicone band, this watch is ready to wear - and tear - with durable Corning Gorilla Glass [3].

Light on the Wrist. Not on Features

Morning Report

Receive an overview of your sleep, recovery and training outlook as soon as you wake up - alongside HRV status and weather. You can even customise your report to show you what you want to see.

HRV Status

Gain a deeper understanding of your overall health, recovery and training performance through heart rate variability while you sleep, based on technology developed by our Firstbeat Analytics team.

Built-in Sports Apps

Tap into 30+ built-in activities, including the triathlon and open-water swimming profiles - new to the Forerunner 255 series. For races and brick workouts, transition to the next activity with a single button press.

Race Widget

Get ready for your next race with training tips, personalised daily suggested workouts and completion time predictions based on course details, weather and performance.

Daily Suggested Workouts

View your entire week of daily suggested workouts, which adapt after every run to match your performance and recovery as well as the races coming up in your Garmin Connect smartphone app calendar.

Garmin Coach

Free adaptive training plans include 5K, 10K and half-marathon programs, featuring guidance from expert coaches that adapt to you and your goals.

Running Power

When using a Running Dynamics Pod or HRM-Pro monitor, get a continuous measurement on your wrist of how much power you're applying to the road as you run, so you can manage your effort.

Recovery Time

Know how long to recover before your next high-effort workout based on your latest training as well as overall stress, sleep and daily activities outside of workouts.

Pacepro Feature

To help you plan your race day strategy, this feature offers GPS-based pace guidance for a selected course or distance, so you can tailor your efforts to what's ahead.

Training Status

Using new indicators such as HRV status, your recent exercise history and performance, get an easy insight into your overall effort - and whether you're training productively, peaking or strained.

Acute Load

See your training history, and compare the intensity of your recent workouts to the optimal range to help improve your fitness.

Training Effect

See how your workouts influence your endurance, speed and power with aerobic and anaerobic training effect feedback.

Performance Condition

While you run, get an analysis of your pace and heart rate for a real-time assessment of your current ability to perform.

Running Dynamics

When using a Running Dynamics Pod or HRM-Pro monitor, the Forerunner 255 Music watch measures crucial running metrics such as cadence, stride length, ground contact time and balance, and more - while comparing to others in the Garmin Connect app.

Courses

Create or find existing courses in the Garmin Connect app, so you'll never run out of places to run. Or plan one on other platforms such as Strava and Komoot, then automatically sync them to your Forerunner.

Visual Race Predictor

Based on your running history and overall fitness level, get an estimate of what your pace could be for a 5K, 10K - or even a marathon. Plus, trend data highlights your training's impact over time.

Cross-Training

Mix up your training with different types of workouts. Free HIIT, strength, cardio, yoga and Pilates workouts come preloaded on the watch, and you can download more from the Garmin Connect app.

A Depth of Wellness Insights

Wrist-Based Heart Rate

The watch constantly samples your heart rate [2] with our latest-generation heart rate sensor and will alert you if it stays too high or too low while you're at rest. It also helps gauge how hard you work during activities - even while swimming.

Body Battery Energy Monitoring

Track your body's energy levels so you can find the best times for activity and rest[2].

Sleep Score and Advanced Sleep Monitoring

Get a score for your sleep's quality and insights on how you can do better. Even keep track of the different sleep stages as well as heart rate, stress, Pulse Ox[3] and respiration.

Pulse Ox Sensor

This wrist-based pulse ox sensor[3] monitors blood oxygen saturation levels to support advanced sleep monitoring and altitude acclimation.

Women's Health Tracking

Use the Garmin Connect app to track your menstrual cycle or pregnancy. Log symptoms, get exercise and nutrition education, and more. Even see and log details on your wrist with the Women's Health Tracking app.

Intensity Minutes

Our intensity minutes feature tells you when during the day you earned them and during what activity.

Stress Tracking

Find out if you're having a calm, balanced or stressful day. Relax reminders will even prompt you to do a short breathing activity when the watch detects that you're feeling stressed.

Health Snapshot Feature

Log a 2-minute session to record key stats, including heart rate[2], heart rate variability, Pulse Ox[3], respiration and stress. Then generate a report with those stats to share via the Garmin Connect app on your compatible smartphone.

Stay Connected at Every Step

Multi-Band GNSS Support

Access multiple global navigation satellite systems, and get access to multiple frequencies sent by navigation satellites for improved accuracy in areas where GNSS signals are reflected, weak or typically don't penetrate - giving you superior accuracy for how far and how fast you've run - even in challenging environments.

Music on Your Wrist

Download up to 500 songs plus playlists from your Spotify, Deezer or Amazon Music accounts (subscription required).

Garmin Pay Contactless Payments

Breeze through checkout lines with Garmin Pay contactless payments[1] through participating providers.

Smart Notifications

Receive emails, texts and alerts right on your watch when paired with your Apple or Android smartphone. You can even respond to texts if you have an Android phone.

Safety and Tracking Features

If you feel unsafe or if your watch senses that an incident occurred, the Assistance and incident detection features4 send your location to emergency contacts. Incident detection is enabled by default for select activity profiles only.

Livetrack Feature

Use LiveTrack to let friends and family follow your real-time location[4] and even view your entire preplanned course. Rest assured that your loved ones know exactly where you're running.

Garmin Connect App

See your health and fitness information, connect and compete with friends, sign up for challenges to earn badges and more - all in one free, zero-subscription app.

Connect IQ Store

Download custom watch faces, add data fields, and get apps and widgets from the Connect IQ Store app downloaded on your compatible smartphone.

See your stats, and track your goals in the Garmin Connect app.

Run with the best. Follow us on the GarminRunning Instagram channel. Learn More

1. View current supported country, payment network and issuing bank information.

2. Activity tracking accuracy.

3. This is not a medical device and is not intended for use in the diagnosis or monitoring of any medical condition; see Garmin.com/ataccuracy. Pulse Ox not available in all countries.

4. When paired with your compatible smartphone. For safety and tracking feature requirements and limitations, see Garmin.com/safety.

Clock Features:

• Time/date
• GPS time sync
• Automatic daylight saving time
• Alarm clock
• Timer
• Stopwatch
• Sunrise/sunset times

Health Monitoring:

• Wrist-based heart rate (constant, every second)
• Daily resting heart rate
• Abnormal heart rate alerts: High and low
• Respiration rate (24X7)
• Pulse Ox blood oxygen saturation: Spot-check, and optional all-day acclimation and in sleep
• Fitness age
• Body battery energy monitor
• All-day stress
• Relaxation breathing timer
• Sleep: Advanced
• Sleep score and insights
• Hydration: In Garmin connect and optional connect IQ widget
• Women's health: In Garmin connect and optional Connect IQ widget
• Health snapshot

Sensors:

• GPS
• Glonass
• Galileo
• Multi-frequency positioning
• Garmin elevate wrist heart rate monitor
• Barometric altimeter
• Compass
• Gyroscope
• Accelerometer
• Thermometer
• Pulse Ox blood oxygen saturation monitor

Daily Smart Features:

• Connectivity: Bluetooth, ANT+, Wi-Fi
• Connect IQ (downloadable watch faces, data fields, widgets and apps)
• On-device connect IQ store
• Smart notifications
• Text response/reject phone call with text (android only)
• Calendar
• Weather
• Real time settings sync with Garmin connect mobile
• Battery saver (customizable low power watch)
• Controls smartphone music
• Plays and controls watch music
• Music storage: up to 500 songs
• Find my phone
• Find my watch
• VIRB remote
• Smartphone compatibility: iPhone and Android
• Pairs with Garmin connect mobile
• Garmin pay

Safety and Tracking Features:

• Livetrack
• Live event sharing: Android only
• Incident detection During select activities
• Assistance

Activity Tracking Features:

• Step counter
• Move bar (displays on device after a period of inactivity; walk for a couple of minutes to reset it)
• Auto goal (learns your activity level and assigns a daily step goal)
• Calories burned
• Floors climbed
• Distance traveled
• Intensity minutes
• True up
• Move IQ
• Garmin connect challenges app: optional Connect IQ app

Gym and Fitness Equipment:

• Available gym activity profiles: Strength, HIIT, cardio and elliptical training, stair stepping, floor climbing, indoor rowing, pilates, yoga
• Cardio workouts
• Strength workouts
• HIIT workouts
• Yoga workouts
• Pilates workouts
• On-screen workout animations
• On-screen workout muscle maps
• Automatic rep counting

Training, Planning and Analysis Features:

• HR zones
• HR alerts
• HR calories
• % HR max
• % HRR
• Recovery time
• Auto Max HR
• Morning report
• Race glance/widget
• HRV status
• HR broadcast (broadcasts HR data over ANT+ to paired devices)
• Respiration rate (during exercise): With compatible accessory
• GPS speed and distance
• Customizable data pages
• Customizable activity profiles
• Auto pause
• Interval training
• Improved interval (includes open repeats, intervals data page, rest screen and auto detection)
• Advanced workouts
• Downloadable training plans
• Auto lap
• Manual lap
• Rest timer
• Configurable lap alerts
• VO2 max (run)
• VO2 max (trail run)
• Training status: Improved
• Training load
• Training load focus
• Training effect
• Training effect (anaerobic)
• Primary benefit (training effect labels)
• Improved recovery time
• Daily suggested workouts: 7 days
• Custom alerts
• Audio prompts
• Finish time
• Virtual partner
• Race an activity
• Auto multisport activities
• Manual multisport activities
• Course guidance
• Touch and/or button lock
• Activity history on watch
• Physio true up

Running Features:

• Available run profiles: Running, outdoor track running, treadmill running, indoor track running, trail running, virtual running, ultra running
• GPS-based distance, time and pace
• Running dynamics: With compatible accessory
• Vertical oscillation and ratio: With compatible accessory
• Ground contact time and balance: With compatible accessory
• Stride length (Real Time): With compatible accessory
• Cadence (provides real-time number of steps per minute
• Running power: With compatible accessory
• Performance condition
• Lactate threshold: With compatible accessory
• Pacepro pacing strategies
• Run workouts
• Race predictor
• Course- and weather-specific Rrce predictor
• Foot pod capable

Outdoor Recreation:

• Available outdoor recreation profiles: Hiking, skiing, snowboarding, XC classic skiing, stand up paddleboarding, rowing
• Point-to-point navigation
• Bread crumb trail in real time
• Back to start
• Tracback
• Ultratrac ode
• Up ahead
• Elevation profile
• Distance to destination
• Barometric trend indicator with storm alert
• Trail run auto climb
• Vertical speed
• Total ascent/descent
• Future elevation plot
• Projected waypoint
• Sun and moon information

Cycling Features:

• Available cycling profiles: Biking, indoor biking, mountain biking, eBiking, eMountain biking
• Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories)
• Courses
• Bike lap and lap maximum power (with power sensor)
• Race an activity
• Ftp (functional threshold power): With compatible accessory
• Compatible with vector and rally power meters
• Power meter compatible
• Compatible with Varia vision (head-mounted display)
• Compatible with Varia Radar (rear-facing radar)
• Compatible with Varia lights
• Speed and cadence sensor support (w/sensor)

Swimming Features:

• Available swim profiles: Pool swimming, open water swimming
• Open-water swim metrics (distance, pace, stroke count/rate, stroke distance, swim efficiency (swolf), calories)
• Pool swim metrics (lengths, distance, pace, stroke count, swim efficiency (swolf), calories)
• Stroke type detection (freestyle, backstroke, breaststroke, butterfly) (pool swim only)
• Drill logging (pool swim only)
• Basic rest timer (up from 0) (pool swim only)
• "Repeat on" rest timer (pool swim only)
• Auto rest (pool swim only)
• Time and distance alerts
• Pacing alerts (pool swim only)
• Countdown start (pool swim only)
• Pool swim workouts
• Critical swim speed
• Underwater wrist-based heart rate
• Heart rate from external HRM (real-time during rests, interval and session stats during rests, and automatic heart rate download post-swim): With HRM-swim or HRM-pro)

Kid Activity Tracking Features:

• Toe-to-toe challenges app: Optional connect IQ toe-to-toe challenges app

Battery Life:

• Smartwatch mode: up to 14 days
• GPS-only GNSS mode: Up to 30 hours
• All-systems GNSS mode with music: Up to 6.5 hours
• All-systems GNSS mode: Up to 25 hours
• All-systems GNSS mode plus multi-Band: Up to 16 hours

Product Features:

• Lens material: Corning gorilla glass 3
• Bezel material: Fiber-reinforced polymer
• Quick release bands: 22 mm, Industry standard
• Strap material: Silicone
• Physical size: 45.6 x 45.6 x 12.9 (mm), Fits wrists with a circumference of 130-205 mm
• Color display
• Display size: 1.3" (33 mm) diameter
• Display resolution: 260 x 260 pixels
• Display type: Sunlight-visible, transflective memory-in-pixel (MIP)
• Smart trainer control