Boston Marathon logo
BOSTON MARATHON 2023

Qiuju Gu

Bib: 31875•F

CT

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Division (F50-54)
#0 / 1207
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
9:17/mi
28:52
↑ 97↓ 3451.5%
10K· 6.21 mi
8:39/mi
55:45
↑ 79↓ 1380.4%
15K· 9.32 mi
8:49/mi
1:23:07
↑ 67↓ 78
20K· 12.43 mi
9:03/mi
1:51:14
↑ 106↓ 860.1%
Half· 13.11 mi
8:56/mi
1:57:20
↑ 19↓ 370.5%
25K· 15.53 mi
9:04/mi
2:19:20
↑ 66↓ 880.2%
30K· 18.64 mi
9:38/mi
2:49:15
↑ 181↓ 1480.2%
20M
9:56/mi
3:02:45
↑ 64↓ 500.2%
21M
11:13/mi
3:13:58
↑ 106↓ 241.6%
35K· 21.75 mi
9:09/mi
3:20:49
↑ 17↓ 861.7%
23M
10:35/mi
3:34:04
↑ 23↓ 630.6%
24M
9:20/mi
3:43:24
↓ 821.3%
40K· 24.85 mi
10:28/mi
3:52:21
↓ 200.3%
25.2M
10:44/mi
3:56:03
↑ 13↓ 160.2%
Finish· 26.22 mi
9:29/mi
4:05:43
↑ 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
Time1:57:20
Pace8:57 /mi
2nd Half
Distance13.11 mi
Time2:08:23
Pace9:48 /mi
📊Positive Split: 9.4% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:48:3728:529:1728:52
9:17
-
10K
6.21 mi12:15:3055:458:5826:53
8:39
-0:38
15K
9.32 mi12:42:521:23:078:5527:22
8:49
+0:10
20K
12.43 mi13:10:591:51:148:5728:07
9:03
+0:14
Half
13.11 mi13:17:051:57:208:576:06
8:56
-0:07
25K
15.53 mi13:39:052:19:208:5822:00
9:04
+0:08
30K
18.64 mi14:09:002:49:159:0529:55
9:38
+0:34
20M
20.00 mi14:22:303:02:459:0813:30
9:56
+0:18
21M
21.00 mi14:33:433:13:589:1411:13
11:13
+1:17
35K
21.75 mi14:40:343:20:499:146:51
9:09
-2:04
23M
23.00 mi14:53:493:34:049:1813:15
10:35
+1:26
24M
24.00 mi15:03:093:43:249:199:20
9:20
-1:15
40K
24.85 mi15:12:063:52:219:218:57
10:28
+1:08
25.2M
25.20 mi15:15:483:56:039:223:42
10:44
+0:16
Finish
26.22 mi15:25:284:05:439:239:40
9:29
-1:15

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

8:39 /mi

Average Pace

9:23 /mi

Slowest Pace

11:13 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:00:21

25% of race

Time at Steady Pace

2:14:45

55% of race

Time at Slower Pace

50:37

21% of race

Average Pace: 9:22 /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 mi11:48:3728:529:1728:52
9:17
#21510
10K
6.21 mi12:15:3055:458:5826:53
8:39
#20536
15K
9.32 mi12:42:521:23:078:5527:22
8:49
#20206
20K
12.43 mi13:10:591:51:148:5728:07
9:03
#20118
Half
13.11 mi13:17:051:57:208:576:06
8:56
#20124
25K
15.53 mi13:39:052:19:208:5822:00
9:04
#19981
30K
18.64 mi14:09:002:49:159:0529:55
9:38
#19964
20M
20.00 mi14:22:303:02:459:0813:30
9:56
#19987
21M
21.00 mi14:33:433:13:589:1411:13
11:13
#20109
35K
21.75 mi14:40:343:20:499:146:51
9:09
#20033
23M
23.00 mi14:53:493:34:049:1813:15
10:35
#20155
24M
24.00 mi15:03:093:43:249:199:20
9:20
#20101
40K
24.85 mi15:12:063:52:219:218:57
10:28
#20147
25.2M
25.20 mi15:15:483:56:039:223:42
10:44
#20127
Finish
26.22 mi15:25:284:05:439:239:40
9:29
#20113
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF50-54Seg. OverallSeg. FemalesSeg. F50-54
5K3.11 mi3.11 mi215108638863819582(Top 74%)7435(Top 65%)7435(Top 616%)
10K6.21 mi3.10 mi20536+9748054+5848054+58419161(Top 72%)7182(Top 63%)7182(Top 595%)
15K9.32 mi3.11 mi20206+3307851+2037851+20319582(Top 74%)7435(Top 65%)7435(Top 616%)
20K12.43 mi3.11 mi20118+887781+707781+7019940(Top 75%)7644(Top 67%)7644(Top 633%)
Half13.11 mi0.68 mi20124-67784-37784-320232(Top 76%)7803(Top 68%)7803(Top 646%)
25K15.53 mi2.42 mi19981+1437700+847700+8419319(Top 73%)7321(Top 64%)7321(Top 607%)
30K18.64 mi3.11 mi19964+177711-117711-1119902(Top 75%)7709(Top 67%)7709(Top 639%)
20M20.00 mi1.36 mi19987-237735-247735-2420295(Top 76%)8019(Top 70%)8019(Top 664%)
21M21.00 mi1.00 mi20109-1227813-787813-7821309(Top 80%)8623(Top 75%)8623(Top 714%)
35K21.75 mi0.75 mi20033+767774+397774+3918611(Top 70%)7180(Top 63%)7180(Top 595%)
23M23.00 mi1.25 mi20155-1227858-847858-8421514(Top 81%)8792(Top 77%)8792(Top 728%)
24M24.00 mi1.00 mi20101+547834+247834+2418622(Top 70%)7239(Top 63%)7239(Top 600%)
40K24.85 mi0.85 mi20147-467869-357869-3521137(Top 79%)8684(Top 76%)8684(Top 719%)
25.2M25.20 mi0.35 mi20127+207867+27867+219816(Top 74%)7957(Top 70%)7957(Top 659%)
Finish26.22 mi1.02 mi20113+147868-17868-120082(Top 75%)8050(Top 70%)8050(Top 667%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 74%
×21story building
+97ft-345ft

Overall

19582

Females

7435

F50-54

7435

5K→10K

3.1 - 6.2 mi

Top 72%
×5story building
+79ft-138ft

Overall

19161

Females

7182

F50-54

7182

10K→15K

6.2 - 9.3 mi

Top 74%
×3story building
+67ft-78ft

Overall

19582

Females

7435

F50-54

7435

15K→20K

9.3 - 12.4 mi

Top 75%
×5story building
+106ft-86ft

Overall

19940

Females

7644

F50-54

7644

20K→Half

12.4 - 13.1 mi

Top 76%
×2story building
+19ft-37ft

Overall

20232

Females

7803

F50-54

7803

Half→25K

13.1 - 15.5 mi

Top 73%
×4story building
+66ft-88ft

Overall

19319

Females

7321

F50-54

7321

25K→30K

15.5 - 18.6 mi

Top 75%
×9story building
+181ft-148ft

Overall

19902

Females

7709

F50-54

7709

30K→20M

18.6 - 20.0 mi

Top 76%
×5story building
+64ft-50ft

Overall

20295

Females

8019

F50-54

8019

20M→21M

20.0 - 21.0 mi

Top 80%
×8story building
+106ft-24ft

Overall

21309

Females

8623

F50-54

8623

21M→35K

21.0 - 21.8 mi

Top 70%
×7story building
+17ft-86ft

Overall

18611

Females

7180

F50-54

7180

35K→23M

21.8 - 23.0 mi

Top 81%
×5story building
+23ft-63ft

Overall

21514

Females

8792

F50-54

8792

23M→24M

23.0 - 24.0 mi

Top 70%
×6story building
+12ft-82ft

Overall

18622

Females

7239

F50-54

7239

24M→40K

24.0 - 24.9 mi

Top 79%
×1story
+6ft-20ft

Overall

21137

Females

8684

F50-54

8684

40K→25.2M

24.9 - 25.2 mi

Top 74%
×1story
+13ft-16ft

Overall

19816

Females

7957

F50-54

7957

25.2M→Finish

25.2 - 26.2 mi

Top 75%
×2story building
+22ft-21ft

Overall

20082

Females

8050

F50-54

8050

Passing Analysis

Category:
Athletes Passed
2408
Passed By
1011
Net Change
+1397
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#21510
5K → 10K101541+974#21510#20536
10K → 15K38151+330#20536#20206
15K → 20K204116+88#20206#20118
20K → Half2632-6#20118#20124
Half → 25K19855+143#20124#19981
25K → 30K163146+17#19981#19964
30K → 20M7497-23#19964#19987
20M → 21M44166-122#19987#20109
21M → 35K9014+76#20109#20033
35K → 23M40162-122#20033#20155
23M → 24M6814+54#20155#20101
24M → 40K3379-46#20101#20147
40K → 25.2M3111+20#20147#20127
25.2M → Finish4127+14#20127#20113
TOTALS24081011+1397
📊

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