Boston Marathon logo
BOSTON MARATHON 2023

Grace Hsu

Bib: 25511•F

MA

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Division (F18-39)
#0 / 4884
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
10:13/mi
31:45
↑ 97↓ 3451.5%
10K· 6.21 mi
9:21/mi
1:00:49
↑ 79↓ 1380.4%
15K· 9.32 mi
9:14/mi
1:29:31
↑ 67↓ 78
20K· 12.43 mi
9:12/mi
1:58:06
↑ 106↓ 860.1%
Half· 13.11 mi
9:14/mi
2:04:24
↑ 19↓ 370.5%
25K· 15.53 mi
9:25/mi
2:27:15
↑ 66↓ 880.2%
30K· 18.64 mi
9:39/mi
2:57:14
↑ 181↓ 1480.2%
20M
9:49/mi
3:10:35
↑ 64↓ 500.2%
21M
10:12/mi
3:20:47
↑ 106↓ 241.6%
35K· 21.75 mi
9:35/mi
3:27:57
↑ 17↓ 861.7%
23M
9:50/mi
3:40:16
↑ 23↓ 630.6%
24M
9:37/mi
3:49:53
↓ 821.3%
40K· 24.85 mi
9:34/mi
3:58:04
↓ 200.3%
25.2M
10:15/mi
4:01:36
↑ 13↓ 160.2%
Finish· 26.22 mi
9:16/mi
4:11:03
↑ 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
Time2:04:24
Pace9:29 /mi
2nd Half
Distance13.11 mi
Time2:06:39
Pace9:40 /mi
📊Positive Split: 1.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:47:2431:4510:1331:45
10:13
-
10K
6.21 mi12:16:281:00:499:4729:04
9:21
-0:52
15K
9.32 mi12:45:101:29:319:3628:42
9:14
-0:07
20K
12.43 mi13:13:451:58:069:3028:35
9:12
-0:02
Half
13.11 mi13:20:032:04:249:296:18
9:14
+0:02
25K
15.53 mi13:42:542:27:159:2922:51
9:25
+0:11
30K
18.64 mi14:12:532:57:149:3029:59
9:39
+0:14
20M
20.00 mi14:26:143:10:359:3213:21
9:49
+0:10
21M
21.00 mi14:36:263:20:479:3410:12
10:12
+0:23
35K
21.75 mi14:43:363:27:579:347:10
9:35
-0:37
23M
23.00 mi14:55:553:40:169:3512:19
9:50
+0:15
24M
24.00 mi15:05:323:49:539:359:37
9:37
-0:13
40K
24.85 mi15:13:433:58:049:358:11
9:34
-0:03
25.2M
25.20 mi15:17:154:01:369:353:32
10:15
+0:41
Finish
26.22 mi15:26:424:11:039:359:27
9:16
-0:59

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

9:12 /mi

Average Pace

9:35 /mi

Slowest Pace

10:15 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

3:25:34

82% of race

Time at Steady Pace

45:29

18% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 9:34 /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 mi11:47:2431:4510:1331:45
10:13
#24003
10K
6.21 mi12:16:281:00:499:4729:04
9:21
#23135
15K
9.32 mi12:45:101:29:319:3628:42
9:14
#22606
20K
12.43 mi13:13:451:58:069:3028:35
9:12
#22113
Half
13.11 mi13:20:032:04:249:296:18
9:14
#22075
25K
15.53 mi13:42:542:27:159:2922:51
9:25
#21830
30K
18.64 mi14:12:532:57:149:3029:59
9:39
#21506
20M
20.00 mi14:26:143:10:359:3213:21
9:49
#21381
21M
21.00 mi14:36:263:20:479:3410:12
10:12
#21227
35K
21.75 mi14:43:363:27:579:347:10
9:35
#21171
23M
23.00 mi14:55:553:40:169:3512:19
9:50
#21054
24M
24.00 mi15:05:323:49:539:359:37
9:37
#20983
40K
24.85 mi15:13:433:58:049:358:11
9:34
#20869
25.2M
25.20 mi15:17:154:01:369:353:32
10:15
#20834
Finish
26.22 mi15:26:424:11:039:359:27
9:16
#20772
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi240039892989221437(Top 81%)8468(Top 74%)8468(Top 173%)
10K6.21 mi3.10 mi23135+8689437+4559437+45522089(Top 83%)8865(Top 78%)8865(Top 182%)
15K9.32 mi3.11 mi22606+5299144+2939144+29321437(Top 81%)8468(Top 74%)8468(Top 173%)
20K12.43 mi3.11 mi22113+4938889+2558889+25520585(Top 77%)8000(Top 70%)8000(Top 164%)
Half13.11 mi0.68 mi22075+388869+208869+2021290(Top 80%)8401(Top 74%)8401(Top 172%)
25K15.53 mi2.42 mi21830+2458726+1438726+14320595(Top 77%)8045(Top 70%)8045(Top 165%)
30K18.64 mi3.11 mi21506+3248558+1688558+16819979(Top 75%)7756(Top 68%)7756(Top 159%)
20M20.00 mi1.36 mi21381+1258510+488510+4819947(Top 75%)7822(Top 68%)7822(Top 160%)
21M21.00 mi1.00 mi21227+1548439+718439+7118738(Top 70%)7193(Top 63%)7193(Top 147%)
35K21.75 mi0.75 mi21171+568415+248415+2420116(Top 76%)7999(Top 70%)7999(Top 164%)
23M23.00 mi1.25 mi21054+1178361+548361+5419548(Top 73%)7712(Top 68%)7712(Top 158%)
24M24.00 mi1.00 mi20983+718336+258336+2519651(Top 74%)7786(Top 68%)7786(Top 159%)
40K24.85 mi0.85 mi20869+1148281+558281+5518596(Top 70%)7276(Top 64%)7276(Top 149%)
25.2M25.20 mi0.35 mi20834+358267+148267+1418361(Top 69%)7170(Top 63%)7170(Top 147%)
Finish26.22 mi1.02 mi20772+628242+258242+2519280(Top 72%)7605(Top 67%)7605(Top 156%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 81%
×21story building
+97ft-345ft

Overall

21437

Females

8468

F18-39

8468

5K→10K

3.1 - 6.2 mi

Top 83%
×5story building
+79ft-138ft

Overall

22089

Females

8865

F18-39

8865

10K→15K

6.2 - 9.3 mi

Top 81%
×3story building
+67ft-78ft

Overall

21437

Females

8468

F18-39

8468

15K→20K

9.3 - 12.4 mi

Top 77%
×5story building
+106ft-86ft

Overall

20585

Females

8000

F18-39

8000

20K→Half

12.4 - 13.1 mi

Top 80%
×2story building
+19ft-37ft

Overall

21290

Females

8401

F18-39

8401

Half→25K

13.1 - 15.5 mi

Top 77%
×4story building
+66ft-88ft

Overall

20595

Females

8045

F18-39

8045

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

19979

Females

7756

F18-39

7756

30K→20M

18.6 - 20.0 mi

Top 75%
×5story building
+64ft-50ft

Overall

19947

Females

7822

F18-39

7822

20M→21M

20.0 - 21.0 mi

Top 70%
×8story building
+106ft-24ft

Overall

18738

Females

7193

F18-39

7193

21M→35K

21.0 - 21.8 mi

Top 76%
×7story building
+17ft-86ft

Overall

20116

Females

7999

F18-39

7999

35K→23M

21.8 - 23.0 mi

Top 73%
×5story building
+23ft-63ft

Overall

19548

Females

7712

F18-39

7712

23M→24M

23.0 - 24.0 mi

Top 74%
×6story building
+12ft-82ft

Overall

19651

Females

7786

F18-39

7786

24M→40K

24.0 - 24.9 mi

Top 70%
×1story
+6ft-20ft

Overall

18596

Females

7276

F18-39

7276

40K→25.2M

24.9 - 25.2 mi

Top 69%
×1story
+13ft-16ft

Overall

18361

Females

7170

F18-39

7170

25.2M→Finish

25.2 - 26.2 mi

Top 72%
×2story building
+22ft-21ft

Overall

19280

Females

7605

F18-39

7605

Passing Analysis

Category:
Athletes Passed
3375
Passed By
144
Net Change
+3231
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#24003
5K → 10K88921+868#24003#23135
10K → 15K5389+529#23135#22606
15K → 20K4974+493#22606#22113
20K → Half5113+38#22113#22075
Half → 25K25712+245#22075#21830
25K → 30K33612+324#21830#21506
30K → 20M14116+125#21506#21381
20M → 21M16410+154#21381#21227
21M → 35K648+56#21227#21171
35K → 23M1269+117#21171#21054
23M → 24M8514+71#21054#20983
24M → 40K1173+114#20983#20869
40K → 25.2M383+35#20869#20834
25.2M → Finish7210+62#20834#20772
TOTALS3375144+3231
📊

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