Boston Marathon logo
BOSTON MARATHON 2023

Deborah Choi

Bib: 17015•F

PA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 44%
Division (F18-39)
#0 / 4884
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:24
Rank: #15290
Start → 5K
25:24 | 8:11/mi
10K· 6.21 mi
50:16
Rank: #15045 (+245)
5K → 10K
24:52 | 8:00/mi
15K· 9.32 mi
1:15:20
Rank: #15001 (+44)
10K → 15K
25:04 | 8:04/mi
20K· 12.43 mi
1:41:28
Rank: #15350 (-349)
15K → 20K
26:08 | 8:25/mi
Half· 13.11 mi
1:46:54
Rank: #15282 (+68)
20K → Half
5:26 | 7:58/mi
25K· 15.53 mi
2:07:01
Rank: #15185 (+97)
Half → 25K
20:07 | 8:18/mi
30K· 18.64 mi
2:33:56
Rank: #15180 (+5)
25K → 30K
26:55 | 8:40/mi
20M
2:45:58
Rank: #15224 (-44)
30K → 20M
12:02 | 8:51/mi
21M
2:55:31
Rank: #15259 (-35)
20M → 21M
9:33 | 9:33/mi
35K· 21.75 mi
3:02:00
Rank: #15264 (-5)
21M → 35K
6:29 | 8:40/mi
23M
3:13:10
Rank: #15281 (-17)
35K → 23M
11:10 | 8:55/mi
24M
3:21:54
Rank: #15301 (-20)
23M → 24M
8:44 | 8:44/mi
40K· 24.85 mi
3:29:25
Rank: #15301
24M → 40K
7:31 | 8:47/mi
25.2M
3:32:41
Rank: #15290 (+11)
40K → 25.2M
3:16 | 9:28/mi
Finish· 26.22 mi
3:41:26
Rank: #15289 (+1)
25.2M → Finish
8:45 | 8:35/mi

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
Time1:46:54
Pace8:09 /mi
2nd Half
Distance13.11 mi
Time1:54:32
Pace8:44 /mi
📊Positive Split: 7.1% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:16:1925:248:1125:24
8:11
-
10K
6.21 mi11:41:1150:168:0524:52
8:00
-0:11
15K
9.32 mi12:06:151:15:208:0525:04
8:04
+0:04
20K
12.43 mi12:32:231:41:288:1026:08
8:25
+0:21
Half
13.11 mi12:37:491:46:548:095:26
7:58
-0:27
25K
15.53 mi12:57:562:07:018:1120:07
8:18
+0:20
30K
18.64 mi13:24:512:33:568:1526:55
8:40
+0:22
20M
20.00 mi13:36:532:45:588:1812:02
8:51
+0:11
21M
21.00 mi13:46:262:55:318:219:33
9:33
+0:42
35K
21.75 mi13:52:553:02:008:226:29
8:40
-0:53
23M
23.00 mi14:04:053:13:108:2411:10
8:55
+0:15
24M
24.00 mi14:12:493:21:548:258:44
8:44
-0:11
40K
24.85 mi14:20:203:29:258:267:31
8:47
+0:03
25.2M
25.20 mi14:23:363:32:418:263:16
9:28
+0:41
Finish
26.22 mi14:32:213:41:268:278:45
8:35
-0:53

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

7:58 /mi

Average Pace

8:27 /mi

Slowest Pace

9:33 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:57:54

80% of race

Time at Steady Pace

30:43

14% of race

Time at Slower Pace

12:49

6% of race

Average Pace: 8:27 /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 mi11:16:1925:248:1125:24
8:11
#15290
10K
6.21 mi11:41:1150:168:0524:52
8:00
#15045
15K
9.32 mi12:06:151:15:208:0525:04
8:04
#15001
20K
12.43 mi12:32:231:41:288:1026:08
8:25
#15350
Half
13.11 mi12:37:491:46:548:095:26
7:58
#15282
25K
15.53 mi12:57:562:07:018:1120:07
8:18
#15185
30K
18.64 mi13:24:512:33:568:1526:55
8:40
#15180
20M
20.00 mi13:36:532:45:588:1812:02
8:51
#15224
21M
21.00 mi13:46:262:55:318:219:33
9:33
#15259
35K
21.75 mi13:52:553:02:008:226:29
8:40
#15264
23M
23.00 mi14:04:053:13:108:2411:10
8:55
#15281
24M
24.00 mi14:12:493:21:548:258:44
8:44
#15301
40K
24.85 mi14:20:203:29:258:267:31
8:47
#15301
25.2M
25.20 mi14:23:363:32:418:263:16
9:28
#15290
Finish
26.22 mi14:32:213:41:268:278:45
8:35
#15289
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi152904827482714960(Top 56%)4656(Top 41%)4656(Top 95%)
10K6.21 mi3.10 mi15045+2454675+1524675+15214845(Top 56%)4578(Top 40%)4578(Top 94%)
15K9.32 mi3.11 mi15001+444664+114664+1114960(Top 56%)4656(Top 41%)4656(Top 95%)
20K12.43 mi3.11 mi15350-3494902-2384902-23816320(Top 61%)5541(Top 49%)5541(Top 113%)
Half13.11 mi0.68 mi15282+684864+384864+3814169(Top 53%)4200(Top 37%)4200(Top 86%)
25K15.53 mi2.42 mi15185+974829+354829+3514958(Top 56%)4810(Top 42%)4810(Top 98%)
30K18.64 mi3.11 mi15180+54873-444873-4415300(Top 57%)5115(Top 45%)5115(Top 105%)
20M20.00 mi1.36 mi15224-444924-514924-5115759(Top 59%)5423(Top 47%)5423(Top 111%)
21M21.00 mi1.00 mi15259-354969-454969-4516216(Top 61%)5744(Top 50%)5744(Top 118%)
35K21.75 mi0.75 mi15264-54986-174986-1716244(Top 61%)5829(Top 51%)5829(Top 119%)
23M23.00 mi1.25 mi15281-175016-305016-3015639(Top 59%)5537(Top 48%)5537(Top 113%)
24M24.00 mi1.00 mi15301-205043-275043-2715863(Top 60%)5728(Top 50%)5728(Top 117%)
40K24.85 mi0.85 mi153015062-195062-1915061(Top 57%)5330(Top 47%)5330(Top 109%)
25.2M25.20 mi0.35 mi15290+115065-35065-315102(Top 57%)5356(Top 47%)5356(Top 110%)
Finish26.22 mi1.02 mi15289+15076-115076-1115930(Top 60%)5765(Top 50%)5765(Top 118%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 56%
×21stories
+97ft-345ft

Overall

14960

Females

4656

F18-39

4656

5K→10K

3.1 - 6.2 mi

Top 56%
×5stories
+79ft-138ft

Overall

14845

Females

4578

F18-39

4578

10K→15K

6.2 - 9.3 mi

Top 56%
×3stories
+67ft-78ft

Overall

14960

Females

4656

F18-39

4656

15K→20K

9.3 - 12.4 mi

Top 61%
×5stories
+106ft-86ft

Overall

16320

Females

5541

F18-39

5541

20K→Half

12.4 - 13.1 mi

Top 53%
×2stories
+19ft-37ft

Overall

14169

Females

4200

F18-39

4200

Half→25K

13.1 - 15.5 mi

Top 56%
×4stories
+66ft-88ft

Overall

14958

Females

4810

F18-39

4810

25K→30K

15.5 - 18.6 mi

Top 57%
×9stories
+181ft-148ft

Overall

15300

Females

5115

F18-39

5115

30K→20M

18.6 - 20.0 mi

Top 59%
×5stories
+64ft-50ft

Overall

15759

Females

5423

F18-39

5423

20M→21M

20.0 - 21.0 mi

Top 61%
×8stories
+106ft-24ft

Overall

16216

Females

5744

F18-39

5744

21M→35K

21.0 - 21.8 mi

Top 61%
×7stories
+17ft-86ft

Overall

16244

Females

5829

F18-39

5829

35K→23M

21.8 - 23.0 mi

Top 59%
×5stories
+23ft-63ft

Overall

15639

Females

5537

F18-39

5537

23M→24M

23.0 - 24.0 mi

Top 60%
×6stories
+12ft-82ft

Overall

15863

Females

5728

F18-39

5728

24M→40K

24.0 - 24.9 mi

Top 57%
×1story
+6ft-20ft

Overall

15061

Females

5330

F18-39

5330

40K→25.2M

24.9 - 25.2 mi

Top 57%
×1story
+13ft-16ft

Overall

15102

Females

5356

F18-39

5356

25.2M→Finish

25.2 - 26.2 mi

Top 60%
×2stories
+22ft-21ft

Overall

15930

Females

5765

F18-39

5765

Passing Analysis

Category:
Athletes Passed
1668
Passed By
1667
Net Change
+1
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15290
5K → 10K447202+245#15290#15045
10K → 15K204160+44#15045#15001
15K → 20K85434-349#15001#15350
20K → Half735+68#15350#15282
Half → 25K17982+97#15282#15185
25K → 30K191186+5#15185#15180
30K → 20M69113-44#15180#15224
20M → 21M69104-35#15224#15259
21M → 35K3944-5#15259#15264
35K → 23M84101-17#15264#15281
23M → 24M6686-20#15281#15301
24M → 40K58580#15301#15301
40K → 25.2M4130+11#15301#15290
25.2M → Finish6362+1#15290#15289
TOTALS16681667+1
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing