Boston Marathon logo
BOSTON MARATHON 2024

Stephanie Tsai

Bib: 16543•F

IL

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 25550
Gender (Female)
#0 / 10924
Top 40%
Masters (Masters Women)
#0 / 6263
Top 28%
Division (F45-49)
#0 / 1753
Top 35%
Race Day Weather
55°/45°F
scattered clouds

⏱️ 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
8:00/mi
24:50
↑ 97↓ 3451.5%
10K· 6.21 mi
8:01/mi
49:45
↑ 79↓ 1380.4%
15K· 9.32 mi
8:10/mi
1:15:08
↑ 67↓ 78
20K· 12.43 mi
8:20/mi
1:41:02
↑ 106↓ 860.1%
Half· 13.11 mi
8:05/mi
1:46:33
↑ 19↓ 370.5%
25K· 15.53 mi
8:37/mi
2:07:26
↑ 66↓ 880.2%
30K· 18.64 mi
9:00/mi
2:35:25
↑ 181↓ 1480.2%
20M
9:26/mi
2:48:14
↑ 64↓ 500.2%
21M
9:32/mi
2:57:46
↑ 106↓ 241.6%
35K· 21.75 mi
8:32/mi
3:04:09
↑ 17↓ 861.7%
23M
9:09/mi
3:15:36
↑ 23↓ 630.6%
24M
8:58/mi
3:24:34
↓ 821.3%
40K· 24.85 mi
9:34/mi
3:32:45
↓ 200.3%
25.2M
9:57/mi
3:36:11
↑ 13↓ 160.2%
Finish· 26.22 mi
8:38/mi
3:44:59
↑ 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
Time1:46:33
Pace8:08 /mi
2nd Half
Distance13.11 mi
Time1:58:26
Pace9:02 /mi
📊Positive Split: 11.2% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:18:2724:508:0024:50
8:00
-
10K
6.21 mi11:43:2249:458:0024:55
8:01
+0:01
15K
9.32 mi12:08:451:15:088:0425:23
8:10
+0:09
20K
12.43 mi12:34:391:41:028:0825:54
8:20
+0:10
Half
13.11 mi12:40:101:46:338:085:31
8:05
-0:15
25K
15.53 mi13:01:032:07:268:1220:53
8:37
+0:32
30K
18.64 mi13:29:022:35:258:2027:59
9:00
+0:23
20M
20.00 mi13:41:512:48:148:2512:49
9:26
+0:26
21M
21.00 mi13:51:232:57:468:289:32
9:32
+0:06
35K
21.75 mi13:57:463:04:098:286:23
8:32
-1:00
23M
23.00 mi14:09:133:15:368:3011:27
9:09
+0:37
24M
24.00 mi14:18:113:24:348:318:58
8:58
-0:11
40K
24.85 mi14:26:223:32:458:348:11
9:34
+0:36
25.2M
25.20 mi14:29:483:36:118:353:26
9:57
+0:23
Finish
26.22 mi14:38:363:44:598:358:48
8:38
-1:19

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

8:00 /mi

Average Pace

8:35 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:20:39

36% of race

Time at Steady Pace

1:01:58

28% of race

Time at Slower Pace

1:22:22

37% of race

Average Pace: 8:35 /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 mi11:18:2724:508:0024:50
8:00
#14612
10K
6.21 mi11:43:2249:458:0024:55
8:01
#14459
15K
9.32 mi12:08:451:15:088:0425:23
8:10
#14456
20K
12.43 mi12:34:391:41:028:0825:54
8:20
#14264
Half
13.11 mi12:40:101:46:338:085:31
8:05
#14199
25K
15.53 mi13:01:032:07:268:1220:53
8:37
#14056
30K
18.64 mi13:29:022:35:258:2027:59
9:00
#13839
20M
20.00 mi13:41:512:48:148:2512:49
9:26
#13853
21M
21.00 mi13:51:232:57:468:289:32
9:32
#13649
35K
21.75 mi13:57:463:04:098:286:23
8:32
#13503
23M
23.00 mi14:09:133:15:368:3011:27
9:09
#13376
24M
24.00 mi14:18:113:24:348:318:58
8:58
#13284
40K
24.85 mi14:26:223:32:458:348:11
9:34
#13255
25.2M
25.20 mi14:29:483:36:118:353:26
9:57
#13200
Finish
26.22 mi14:38:363:44:598:358:48
8:38
#13148
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi146124696469614544(Top 57%)4686(Top 43%)4686(Top 267%)
10K6.21 mi3.10 mi14459+1534611+854611+8514362(Top 56%)4548(Top 42%)4548(Top 259%)
15K9.32 mi3.11 mi14456+34607+44607+414544(Top 57%)4686(Top 43%)4686(Top 267%)
20K12.43 mi3.11 mi14264+1924518+894518+8913923(Top 54%)4376(Top 40%)4376(Top 250%)
Half13.11 mi0.68 mi14199+654488+304488+3013358(Top 52%)4122(Top 38%)4122(Top 235%)
25K15.53 mi2.42 mi14056+1434439+494439+4913671(Top 54%)4420(Top 40%)4420(Top 252%)
30K18.64 mi3.11 mi13839+2174386+534386+5313276(Top 52%)4437(Top 41%)4437(Top 253%)
20M20.00 mi1.36 mi13853-144452-664452-6614210(Top 56%)5236(Top 48%)5236(Top 299%)
21M21.00 mi1.00 mi13649+2044407+454407+4511017(Top 43%)3758(Top 34%)3758(Top 214%)
35K21.75 mi0.75 mi13503+1464360+474360+4710975(Top 43%)3743(Top 34%)3743(Top 214%)
23M23.00 mi1.25 mi13376+1274339+214339+2111914(Top 47%)4360(Top 40%)4360(Top 249%)
24M24.00 mi1.00 mi13284+924340-14340-111995(Top 47%)4403(Top 40%)4403(Top 251%)
40K24.85 mi0.85 mi13255+294358-184358-1813397(Top 52%)5235(Top 48%)5235(Top 299%)
25.2M25.20 mi0.35 mi13200+554347+114347+1110820(Top 42%)4013(Top 37%)4013(Top 229%)
Finish26.22 mi1.02 mi13148+524358-114358-1112286(Top 48%)4604(Top 42%)4604(Top 263%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 57%
×21story building
+97ft-345ft

Overall

14544

Females

4686

F45-49

4686

5K→10K

3.1 - 6.2 mi

Top 56%
×5story building
+79ft-138ft

Overall

14362

Females

4548

F45-49

4548

10K→15K

6.2 - 9.3 mi

Top 57%
×3story building
+67ft-78ft

Overall

14544

Females

4686

F45-49

4686

15K→20K

9.3 - 12.4 mi

Top 54%
×5story building
+106ft-86ft

Overall

13923

Females

4376

F45-49

4376

20K→Half

12.4 - 13.1 mi

Top 52%
×2story building
+19ft-37ft

Overall

13358

Females

4122

F45-49

4122

Half→25K

13.1 - 15.5 mi

Top 54%
×4story building
+66ft-88ft

Overall

13671

Females

4420

F45-49

4420

25K→30K

15.5 - 18.6 mi

Top 52%
×9story building
+181ft-148ft

Overall

13276

Females

4437

F45-49

4437

30K→20M

18.6 - 20.0 mi

Top 56%
×5story building
+64ft-50ft

Overall

14210

Females

5236

F45-49

5236

20M→21M

20.0 - 21.0 mi

Top 43%
×8story building
+106ft-24ft

Overall

11017

Females

3758

F45-49

3758

21M→35K

21.0 - 21.8 mi

Top 43%
×7story building
+17ft-86ft

Overall

10975

Females

3743

F45-49

3743

35K→23M

21.8 - 23.0 mi

Top 47%
×5story building
+23ft-63ft

Overall

11914

Females

4360

F45-49

4360

23M→24M

23.0 - 24.0 mi

Top 47%
×6story building
+12ft-82ft

Overall

11995

Females

4403

F45-49

4403

24M→40K

24.0 - 24.9 mi

Top 52%
×1story
+6ft-20ft

Overall

13397

Females

5235

F45-49

5235

40K→25.2M

24.9 - 25.2 mi

Top 42%
×1story
+13ft-16ft

Overall

10820

Females

4013

F45-49

4013

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2story building
+22ft-21ft

Overall

12286

Females

4604

F45-49

4604

Passing Analysis

Category:
Athletes Passed
2837
Passed By
1373
Net Change
+1464
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#14612
5K → 10K364211+153#14612#14459
10K → 15K249246+3#14459#14456
15K → 20K328136+192#14456#14264
20K → Half8217+65#14264#14199
Half → 25K289146+143#14199#14056
25K → 30K383166+217#14056#13839
30K → 20M128142-14#13839#13853
20M → 21M25147+204#13853#13649
21M → 35K1559+146#13649#13503
35K → 23M18255+127#13503#13376
23M → 24M14654+92#13376#13284
24M → 40K10576+29#13284#13255
40K → 25.2M7217+55#13255#13200
25.2M → Finish10351+52#13200#13148
TOTALS28371373+1464
📊

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