Boston Marathon logo
BOSTON MARATHON 2023

Katherine Lee

Bib: 16813•F

PA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Top 42%
Gender (Female)
#0 / 11423
Top 24%
Division (F18-39)
#0 / 4884
Top 40%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent
Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
5K· 3.11 mi
7:42/mi
23:55
↑ 97↓ 3451.5%
10K· 6.21 mi
7:40/mi
47:45
↑ 79↓ 1380.4%
15K· 9.32 mi
7:43/mi
1:11:42
↑ 67↓ 78
20K· 12.43 mi
7:50/mi
1:36:01
↑ 106↓ 860.1%
Half· 13.11 mi
7:49/mi
1:41:21
↑ 19↓ 370.5%
25K· 15.53 mi
7:50/mi
2:00:21
↑ 66↓ 880.2%
30K· 18.64 mi
8:04/mi
2:25:24
↑ 181↓ 1480.2%
20M
8:06/mi
2:36:25
↑ 64↓ 500.2%
21M
8:20/mi
2:44:45
↑ 106↓ 241.6%
35K· 21.75 mi
7:53/mi
2:50:39
↑ 17↓ 861.7%
23M
8:06/mi
3:00:47
↑ 23↓ 630.6%
24M
7:59/mi
3:08:46
↓ 821.3%
40K· 24.85 mi
8:02/mi
3:15:38
↓ 200.3%
25.2M
8:45/mi
3:18:39
↑ 13↓ 160.2%
Finish· 26.22 mi
7:58/mi
3:26:46
↑ 22↓ 21

The Course

Is this your race?

Claim it — unlock a deeper AI report on this race, free

A personalized Race Performance Report that goes beyond this page — emailed to you, built from your real splits.

Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:41:21
Pace7:44 /mi
2nd Half
Distance13.11 mi
Time1:45:25
Pace8:02 /mi
📊Positive Split: 4.0% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:14:1023:557:4223:55
7:42
-
10K
6.21 mi11:38:0047:457:4123:50
7:40
-0:02
15K
9.32 mi12:01:571:11:427:4223:57
7:43
+0:03
20K
12.43 mi12:26:161:36:017:4424:19
7:50
+0:07
Half
13.11 mi12:31:361:41:217:445:20
7:49
-0:01
25K
15.53 mi12:50:362:00:217:4519:00
7:50
+0:01
30K
18.64 mi13:15:392:25:247:4825:03
8:04
+0:14
20M
20.00 mi13:26:402:36:257:4911:01
8:06
+0:02
21M
21.00 mi13:35:002:44:457:518:20
8:20
+0:14
35K
21.75 mi13:40:542:50:397:515:54
7:53
-0:27
23M
23.00 mi13:51:023:00:477:5210:08
8:06
+0:13
24M
24.00 mi13:59:013:08:467:527:59
7:59
-0:07
40K
24.85 mi14:05:533:15:387:526:52
8:02
+0:03
25.2M
25.20 mi14:08:543:18:397:533:01
8:45
+0:43
Finish
26.22 mi14:17:013:26:467:548:07
7:58
-0:47

Checkpoints & Pacing

📈Pace Line

Pace Progression

Track your pace changes throughout the race. Dot colors mark your quickest to easiest segments, relative to your own pace.

Fastest Pace

7:40 /mi

Average Pace

7:54 /mi

Slowest Pace

8:45 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:23:45

99% of race

Time at Steady Pace

3:01

1% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:53 /mi

Loading chart...
Faster pace (< avg)
Steady pace (≈ avg)
Slower pace (> avg)

🎨Heatmap

Pace Heatmap

Where you sped up and eased off relative to your own pace across the race. Colors are relative to your own range, not to other runners.

Loading...
0mi6.6mi13.1mi19.7mi26.2mi
Pace:
Faster
Steady
Slower

Click or hover over segments to see details

✨Sparklines

Checkpoint Splits with Pace Trends

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:14:1023:557:4223:55
7:42
#11445
10K
6.21 mi11:38:0047:457:4123:50
7:40
#11664
15K
9.32 mi12:01:571:11:427:4223:57
7:43
#11723
20K
12.43 mi12:26:161:36:017:4424:19
7:50
#11755
Half
13.11 mi12:31:361:41:217:445:20
7:49
#11819
25K
15.53 mi12:50:362:00:217:4519:00
7:50
#11697
30K
18.64 mi13:15:392:25:247:4825:03
8:04
#11612
20M
20.00 mi13:26:402:36:257:4911:01
8:06
#11544
21M
21.00 mi13:35:002:44:457:518:20
8:20
#11382
35K
21.75 mi13:40:542:50:397:515:54
7:53
#11363
23M
23.00 mi13:51:023:00:477:5210:08
8:06
#11300
24M
24.00 mi13:59:013:08:467:527:59
7:59
#11289
40K
24.85 mi14:05:533:15:387:526:52
8:02
#11224
25.2M
25.20 mi14:08:543:18:397:533:01
8:45
#11202
Finish
26.22 mi14:17:013:26:467:548:07
7:58
#11218
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi114452567256711923(Top 45%)2857(Top 25%)2857(Top 58%)
10K6.21 mi3.10 mi11664-2192686-1192686-11912006(Top 45%)2877(Top 25%)2877(Top 59%)
15K9.32 mi3.11 mi11723-592741-552741-5511923(Top 45%)2857(Top 25%)2857(Top 58%)
20K12.43 mi3.11 mi11755-322772-312772-3111970(Top 45%)2953(Top 26%)2953(Top 60%)
Half13.11 mi0.68 mi11819-642806-342806-3412874(Top 48%)3403(Top 30%)3403(Top 70%)
25K15.53 mi2.42 mi11697+1222756+502756+5011408(Top 43%)2720(Top 24%)2720(Top 56%)
30K18.64 mi3.11 mi11612+852757-12757-111395(Top 43%)2846(Top 25%)2846(Top 58%)
20M20.00 mi1.36 mi11544+682739+182739+1811087(Top 42%)2776(Top 24%)2776(Top 57%)
21M21.00 mi1.00 mi11382+1622662+772662+779462(Top 36%)2136(Top 19%)2136(Top 44%)
35K21.75 mi0.75 mi11363+192663-12663-111325(Top 43%)3032(Top 27%)3032(Top 62%)
23M23.00 mi1.25 mi11300+632659+42659+410425(Top 39%)2719(Top 24%)2719(Top 56%)
24M24.00 mi1.00 mi11289+112672-132672-1311136(Top 42%)3160(Top 28%)3160(Top 65%)
40K24.85 mi0.85 mi11224+652670+22670+210284(Top 39%)2795(Top 24%)2795(Top 57%)
25.2M25.20 mi0.35 mi11202+222672-22672-211069(Top 42%)3227(Top 28%)3227(Top 66%)
Finish26.22 mi1.02 mi11218-162701-292701-2911881(Top 45%)3638(Top 32%)3638(Top 74%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 45%
×21story building
+97ft-345ft

Overall

11923

Females

2857

F18-39

2857

5K→10K

3.1 - 6.2 mi

Top 45%
×5story building
+79ft-138ft

Overall

12006

Females

2877

F18-39

2877

10K→15K

6.2 - 9.3 mi

Top 45%
×3story building
+67ft-78ft

Overall

11923

Females

2857

F18-39

2857

15K→20K

9.3 - 12.4 mi

Top 45%
×5story building
+106ft-86ft

Overall

11970

Females

2953

F18-39

2953

20K→Half

12.4 - 13.1 mi

Top 48%
×2story building
+19ft-37ft

Overall

12874

Females

3403

F18-39

3403

Half→25K

13.1 - 15.5 mi

Top 43%
×4story building
+66ft-88ft

Overall

11408

Females

2720

F18-39

2720

25K→30K

15.5 - 18.6 mi

Top 43%
×9story building
+181ft-148ft

Overall

11395

Females

2846

F18-39

2846

30K→20M

18.6 - 20.0 mi

Top 42%
×5story building
+64ft-50ft

Overall

11087

Females

2776

F18-39

2776

20M→21M

20.0 - 21.0 mi

Top 36%
×8story building
+106ft-24ft

Overall

9462

Females

2136

F18-39

2136

21M→35K

21.0 - 21.8 mi

Top 43%
×7story building
+17ft-86ft

Overall

11325

Females

3032

F18-39

3032

35K→23M

21.8 - 23.0 mi

Top 39%
×5story building
+23ft-63ft

Overall

10425

Females

2719

F18-39

2719

23M→24M

23.0 - 24.0 mi

Top 42%
×6story building
+12ft-82ft

Overall

11136

Females

3160

F18-39

3160

24M→40K

24.0 - 24.9 mi

Top 39%
×1story
+6ft-20ft

Overall

10284

Females

2795

F18-39

2795

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

11069

Females

3227

F18-39

3227

25.2M→Finish

25.2 - 26.2 mi

Top 45%
×2story building
+22ft-21ft

Overall

11881

Females

3638

F18-39

3638

Passing Analysis

Category:
Athletes Passed
1701
Passed By
1474
Net Change
+227
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11445
5K → 10K206425-219#11445#11664
10K → 15K156215-59#11664#11723
15K → 20K154186-32#11723#11755
20K → Half1478-64#11755#11819
Half → 25K19674+122#11819#11697
25K → 30K211126+85#11697#11612
30K → 20M12860+68#11612#11544
20M → 21M18523+162#11544#11382
21M → 35K6546+19#11382#11363
35K → 23M11653+63#11363#11300
23M → 24M6857+11#11300#11289
24M → 40K9328+65#11289#11224
40K → 25.2M4321+22#11224#11202
25.2M → Finish6682-16#11202#11218
TOTALS17011474+227
📊

Passing Visuals

Category:
Loading...

🔄Passing Circle

Loading...

🌊Position Flow

Loading...

🏃Race Lanes

Loading...

Upload your GPX file

Supports Garmin, Apple Watch, Polar, Suunto, COROS, Strava, and other apps

.gpx files up to 10MB

Export Track Data

Download your race performance as a GPX or TCX file to import into Strava, Garmin Connect, or other fitness apps.

Questions or issues regarding timing data?

If you notice any discrepancies in your timing data or have questions about your results, our support team can help.

Contact Race Support

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing