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BOSTON MARATHON 2024

Sangji Ahn

Bib: 20307•F

CA

0:00
0:00
/ mi
Masters
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Overall
#0 / 25550
Gender (Female)
#0 / 10924
Top 38%
Masters (Masters Women)
#0 / 6263
Top 27%
Division (F45-49)
#0 / 1753
Top 33%
Race Day Weather
55°/45°F
scattered clouds

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:54
Rank: #16852
Start → 5K
25:54 | 8:20/mi
10K· 6.21 mi
51:48
Rank: #16548 (+304)
5K → 10K
25:54 | 8:20/mi
15K· 9.32 mi
1:17:48
Rank: #16203 (+345)
10K → 15K
26:00 | 8:22/mi
20K· 12.43 mi
1:44:12
Rank: #15745 (+458)
15K → 20K
26:24 | 8:30/mi
Half· 13.11 mi
1:49:50
Rank: #15686 (+59)
20K → Half
5:38 | 8:15/mi
25K· 15.53 mi
2:10:38
Rank: #15270 (+416)
Half → 25K
20:48 | 8:35/mi
30K· 18.64 mi
2:37:48
Rank: #14613 (+657)
25K → 30K
27:10 | 8:45/mi
20M
2:49:37
Rank: #14262 (+351)
30K → 20M
11:49 | 8:42/mi
21M
2:58:39
Rank: #13911 (+351)
20M → 21M
9:02 | 9:02/mi
35K· 21.75 mi
3:05:05
Rank: #13753 (+158)
21M → 35K
6:26 | 8:36/mi
23M
3:16:01
Rank: #13493 (+260)
35K → 23M
10:56 | 8:44/mi
24M
3:24:41
Rank: #13317 (+176)
23M → 24M
8:40 | 8:40/mi
40K· 24.85 mi
3:31:55
Rank: #13078 (+239)
24M → 40K
7:14 | 8:28/mi
25.2M
3:35:18
Rank: #13005 (+73)
40K → 25.2M
3:23 | 9:49/mi
Finish· 26.22 mi
3:43:43
Rank: #12844 (+161)
25.2M → Finish
8:25 | 8:16/mi

The Course

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Half Splits

1st Half· via HalfFaster
Distance13.11 mi
Time1:49:50
Pace8:23 /mi
2nd Half
Distance13.11 mi
Time1:53:53
Pace8:41 /mi
📊Positive Split: 3.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:21:1425:548:2025:54
8:20
-
10K
6.21 mi11:47:0851:488:2025:54
8:20
0:00
15K
9.32 mi12:13:081:17:488:2126:00
8:22
+0:02
20K
12.43 mi12:39:321:44:128:2326:24
8:30
+0:08
Half
13.11 mi12:45:101:49:508:235:38
8:15
-0:15
25K
15.53 mi13:05:582:10:388:2520:48
8:35
+0:20
30K
18.64 mi13:33:082:37:488:2827:10
8:45
+0:10
20M
20.00 mi13:44:572:49:378:2911:49
8:42
-0:03
21M
21.00 mi13:53:592:58:398:309:02
9:02
+0:20
35K
21.75 mi14:00:253:05:058:316:26
8:36
-0:26
23M
23.00 mi14:11:213:16:018:3110:56
8:44
+0:08
24M
24.00 mi14:20:013:24:418:328:40
8:40
-0:04
40K
24.85 mi14:27:153:31:558:327:14
8:28
-0:12
25.2M
25.20 mi14:30:383:35:188:333:23
9:49
+1:21
Finish
26.22 mi14:39:033:43:438:328:25
8:16
-1:33

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

8:15 /mi

Average Pace

8:32 /mi

Slowest Pace

9:49 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:40:20

98% of race

Time at Steady Pace

0:00

0% of race

Time at Slower Pace

3:23

2% of race

Average Pace: 8:32 /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 mi11:21:1425:548:2025:54
8:20
#16852
10K
6.21 mi11:47:0851:488:2025:54
8:20
#16548
15K
9.32 mi12:13:081:17:488:2126:00
8:22
#16203
20K
12.43 mi12:39:321:44:128:2326:24
8:30
#15745
Half
13.11 mi12:45:101:49:508:235:38
8:15
#15686
25K
15.53 mi13:05:582:10:388:2520:48
8:35
#15270
30K
18.64 mi13:33:082:37:488:2827:10
8:45
#14613
20M
20.00 mi13:44:572:49:378:2911:49
8:42
#14262
21M
21.00 mi13:53:592:58:398:309:02
9:02
#13911
35K
21.75 mi14:00:253:05:058:316:26
8:36
#13753
23M
23.00 mi14:11:213:16:018:3110:56
8:44
#13493
24M
24.00 mi14:20:013:24:418:328:40
8:40
#13317
40K
24.85 mi14:27:153:31:558:327:14
8:28
#13078
25.2M
25.20 mi14:30:383:35:188:333:23
9:49
#13005
Finish
26.22 mi14:39:033:43:438:328:25
8:16
#12844
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi168526066606615661(Top 61%)5362(Top 49%)5362(Top 306%)
10K6.21 mi3.10 mi16548+3045891+1755891+17516342(Top 64%)5728(Top 52%)5728(Top 327%)
15K9.32 mi3.11 mi16203+3455671+2205671+22015661(Top 61%)5362(Top 49%)5362(Top 306%)
20K12.43 mi3.11 mi15745+4585419+2525419+25214802(Top 58%)4886(Top 45%)4886(Top 279%)
Half13.11 mi0.68 mi15686+595381+385381+3814376(Top 56%)4675(Top 43%)4675(Top 267%)
25K15.53 mi2.42 mi15270+4165162+2195162+21913477(Top 53%)4305(Top 39%)4305(Top 246%)
30K18.64 mi3.11 mi14613+6574847+3154847+31511928(Top 47%)3701(Top 34%)3701(Top 211%)
20M20.00 mi1.36 mi14262+3514687+1604687+16010553(Top 41%)3241(Top 30%)3241(Top 185%)
21M21.00 mi1.00 mi13911+3514547+1404547+1408786(Top 34%)2586(Top 24%)2586(Top 148%)
35K21.75 mi0.75 mi13753+1584491+564491+5611335(Top 44%)3939(Top 36%)3939(Top 225%)
23M23.00 mi1.25 mi13493+2604408+834408+839765(Top 38%)3279(Top 30%)3279(Top 187%)
24M24.00 mi1.00 mi13317+1764356+524356+5210424(Top 41%)3653(Top 33%)3653(Top 208%)
40K24.85 mi0.85 mi13078+2394266+904266+908182(Top 32%)2680(Top 25%)2680(Top 153%)
25.2M25.20 mi0.35 mi13005+734247+194247+1910199(Top 40%)3729(Top 34%)3729(Top 213%)
Finish26.22 mi1.02 mi12844+1614198+494198+4910124(Top 40%)3576(Top 33%)3576(Top 204%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 61%
×21stories
+97ft-345ft

Overall

15661

Females

5362

F45-49

5362

5K→10K

3.1 - 6.2 mi

Top 64%
×5stories
+79ft-138ft

Overall

16342

Females

5728

F45-49

5728

10K→15K

6.2 - 9.3 mi

Top 61%
×3stories
+67ft-78ft

Overall

15661

Females

5362

F45-49

5362

15K→20K

9.3 - 12.4 mi

Top 58%
×5stories
+106ft-86ft

Overall

14802

Females

4886

F45-49

4886

20K→Half

12.4 - 13.1 mi

Top 56%
×2stories
+19ft-37ft

Overall

14376

Females

4675

F45-49

4675

Half→25K

13.1 - 15.5 mi

Top 53%
×4stories
+66ft-88ft

Overall

13477

Females

4305

F45-49

4305

25K→30K

15.5 - 18.6 mi

Top 47%
×9stories
+181ft-148ft

Overall

11928

Females

3701

F45-49

3701

30K→20M

18.6 - 20.0 mi

Top 41%
×5stories
+64ft-50ft

Overall

10553

Females

3241

F45-49

3241

20M→21M

20.0 - 21.0 mi

Top 34%
×8stories
+106ft-24ft

Overall

8786

Females

2586

F45-49

2586

21M→35K

21.0 - 21.8 mi

Top 44%
×7stories
+17ft-86ft

Overall

11335

Females

3939

F45-49

3939

35K→23M

21.8 - 23.0 mi

Top 38%
×5stories
+23ft-63ft

Overall

9765

Females

3279

F45-49

3279

23M→24M

23.0 - 24.0 mi

Top 41%
×6stories
+12ft-82ft

Overall

10424

Females

3653

F45-49

3653

24M→40K

24.0 - 24.9 mi

Top 32%
×1story
+6ft-20ft

Overall

8182

Females

2680

F45-49

2680

40K→25.2M

24.9 - 25.2 mi

Top 40%
×1story
+13ft-16ft

Overall

10199

Females

3729

F45-49

3729

25.2M→Finish

25.2 - 26.2 mi

Top 40%
×2stories
+22ft-21ft

Overall

10124

Females

3576

F45-49

3576

Passing Analysis

Category:
Athletes Passed
4435
Passed By
427
Net Change
+4008
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#16852
5K → 10K443139+304#16852#16548
10K → 15K43489+345#16548#16203
15K → 20K49840+458#16203#15745
20K → Half6910+59#15745#15686
Half → 25K45034+416#15686#15270
25K → 30K68225+657#15270#14613
30K → 20M3609+351#14613#14262
20M → 21M3565+351#14262#13911
21M → 35K17517+158#13911#13753
35K → 23M27717+260#13753#13493
23M → 24M19822+176#13493#13317
24M → 40K2401+239#13317#13078
40K → 25.2M796+73#13078#13005
25.2M → Finish17413+161#13005#12844
TOTALS4435427+4008
📊

Passing Visuals

Category:
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🔥Passing Intensity

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing