Garmin Forerunner 170 – 43 mm is a GPS smartwatch built for runners, with a 1.2” touch AMOLED display and battery life of up to 10 days in smartwatch mode or 20 hours with GPS. It offers GPS/GNSS, heart rate monitoring, VO₂ max, HRV Status, Training Readiness, Running Dynamics and Recovery Time, plus Garmin Coach with adaptive training plans and over 80 sport profiles. It also includes sleep monitoring, Body Battery™, Pulse Ox, smart notifications, Garmin Pay™, LiveTrack™ and safety features.
Model
Forerunner 170
General
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Strap material
silicone
Lens Material
chemically strengthened glass
Bezel Material
fiber-reinforced polymer
Quick Release bands
20 mm, Industry standard
Display Size
1.2" (30.4 mm) diameter
Display resolution
390 x 390 pixels
Color display
Yes
Price updated Oct 20, 2026, 12:07 AM
Large font option
Yes
Battery life
Smartwatch mode: Up to 10 days (4 days display always-on)
Battery Saver Smartwatch mode: Up to 19 days
GPS-Only GNSS mode: Up to 20 hours
All-Systems GNSS mode: Up to 14 hours
Charging method
Garmin proprietary plug charger
Memory/History
4 GB
Clock Features
• Time/date
• GPS Time Sync
• Automatic daylight saving time
• Alarm clock
• Smart wake alarm
• Timer
• Stopwatch
• Sunrise/sunset times
Health & Wellness Monitoring
• Heart rate
• Resting heart rate
• Abnormal heart rate alerts
• Respiration rate
• Fitness age
• Body Battery™ energy monitor
• All-day stress
• Relaxation reminders
• Relaxation breathing timer
• Breathwork
• Sleep
• Sleep coach
• Breathing variations
• Nap detection
• Hydration
• Women's health
• Health snapshot
• Lifestyle logging
• Health status
• Incident Detection during select activities
• Incident detection alert on phone for wearables
• Assistance
• Live Event Sharing
Activity Tracking Features
• Step counter
• Move alerts (displays on device after a period of inactivity)
• Move alert movement options
• Auto goal (learns your activity level and assigns a daily step goal)
• Calories burned
• Floors climbed
• Distance traveled
• Intensity minutes
• TrueUp™
• Move IQ™
• Garmin Connect™ Challenges app yes (optional Connect IQ app)
• Automatic rep counting
Training, Planning and Analysis Features
• Improved interval (includes open repeats, intervals data page, rest screen and auto detection)
• Customizable data pages
• Downloadable training plans
• Course guidance
• HR zones
• HR alerts
• HR calories
• % HR max
• % HRR
• Recovery time
• Auto max HR
• Race glance/widget
• HRV status
• HR broadcast (broadcasts HR data over ANT+® to paired devices)
• Respiration rate (during exercise) yes (with compatible accessory)
• GPS speed and distance
• Customizable activity profiles
• Auto Pause® automatic timer halt
• Interval training
• Advanced workouts
• HRM running pace and distance
• Auto Lap® interval tracking feature
• Manual lap
• Rest timer
• Configurable lap alerts
• VO2 Max (run)
• VO2 Max (trail run)
• Load ratio
• Training load
• Training load focus
• Training effect
• Training effect (anaerobic)
• Primary benefit (training effect labels)
• Custom alerts
• Voice alerts
• Finish time
• Race an Activity
• Touch and/or button lock
• Shortcuts
• Activity history on watch
• Physio TrueUp
• Unified training status
Running Features
• GPS-based distance, time and pace
• Running dynamics
• Vertical oscillation and ratio
• Ground contact time and balance yes (GCT balance with accessory)
• Stride length (real time)
• Cadence (provides real-time number of steps per minute)
• Running power
• Grade-adjusted pace
• PacePro™ pacing strategies
• Run workouts
• Quick workout
• Race predictor
• Course- and weather-specific race predictor
• Foot pod capable
• Run/walk/stand detection
Outdoor Recreation
• UltraTrac mode
• Elevation profile
• Distance to destination
• Vertical speed
• Total ascent/descent
• Rest timer (ultra run only)
• Auto rest
• Future elevation plot
• Sun and moon information
Cycling Features
• Courses
• Bike lap and lap maximum power (with power sensor)
• Race an activity
• Alerts (triggers alarm when you reach goals including time, distance, heart rate or calories)
• Compatible with Vector™ and Rally™ (power meters)
• Compatible with Varia™ radar (rear-facing radar)
• Compatible with Varia™ lights
• Compatible with Varia™ headlight camera
• Speed and cadence sensor support (w/sensor)
• Power meter compatible
Swimming Features
• 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
• Countdown start (pool swim only)
• Pool swim workouts
• 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)
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