Boston Marathon logo
BOSTON MARATHON 2023

Xiaoqing Jiang

Bib: 31747•F

0:00
0:00
/ mi
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Top 43%
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
7:58/mi
24:45
↑ 97↓ 3451.5%
10K· 6.21 mi
7:37/mi
48:26
↑ 79↓ 1380.4%
15K· 9.32 mi
7:58/mi
1:13:11
↑ 67↓ 78
20K· 12.43 mi
8:15/mi
1:38:50
↑ 106↓ 860.1%
Half· 13.11 mi
8:02/mi
1:44:19
↑ 19↓ 370.5%
25K· 15.53 mi
8:29/mi
2:04:53
↑ 66↓ 880.2%
30K· 18.64 mi
8:52/mi
2:32:25
↑ 181↓ 1480.2%
20M
9:02/mi
2:44:41
↑ 64↓ 500.2%
21M
9:56/mi
2:54:37
↑ 106↓ 241.6%
35K· 21.75 mi
8:29/mi
3:00:58
↑ 17↓ 861.7%
23M
8:56/mi
3:12:09
↑ 23↓ 630.6%
24M
8:37/mi
3:20:46
↓ 821.3%
40K· 24.85 mi
8:37/mi
3:28:08
↓ 200.3%
25.2M
9:31/mi
3:31:25
↑ 13↓ 160.2%
Finish· 26.22 mi
8:16/mi
3:39:50
↑ 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
Time1:44:19
Pace7:57 /mi
2nd Half
Distance13.11 mi
Time1:55:31
Pace8:49 /mi
📊Positive Split: 10.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:44:0624:457:5824:45
7:58
-
10K
6.21 mi12:07:4748:267:4823:41
7:37
-0:21
15K
9.32 mi12:32:321:13:117:5124:45
7:58
+0:21
20K
12.43 mi12:58:111:38:507:5725:39
8:15
+0:17
Half
13.11 mi13:03:401:44:197:575:29
8:02
-0:13
25K
15.53 mi13:24:142:04:538:0220:34
8:29
+0:27
30K
18.64 mi13:51:462:32:258:1127:32
8:52
+0:23
20M
20.00 mi14:04:022:44:418:1412:16
9:02
+0:10
21M
21.00 mi14:13:582:54:378:199:56
9:56
+0:54
35K
21.75 mi14:20:193:00:588:196:21
8:29
-1:27
23M
23.00 mi14:31:303:12:098:2111:11
8:56
+0:27
24M
24.00 mi14:40:073:20:468:228:37
8:37
-0:19
40K
24.85 mi14:47:293:28:088:227:22
8:37
0:00
25.2M
25.20 mi14:50:463:31:258:233:17
9:31
+0:54
Finish
26.22 mi14:59:113:39:508:238:25
8:16
-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

7:37 /mi

Average Pace

8:23 /mi

Slowest Pace

9:56 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:18:40

36% of race

Time at Steady Pace

1:16:58

35% of race

Time at Slower Pace

1:04:12

29% of race

Average Pace: 8:23 /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 mi11:44:0624:457:5824:45
7:58
#13783
10K
6.21 mi12:07:4748:267:4823:41
7:37
#12670
15K
9.32 mi12:32:321:13:117:5124:45
7:58
#13163
20K
12.43 mi12:58:111:38:507:5725:39
8:15
#13730
Half
13.11 mi13:03:401:44:197:575:29
8:02
#13769
25K
15.53 mi13:24:142:04:538:0220:34
8:29
#14196
30K
18.64 mi13:51:462:32:258:1127:32
8:52
#14638
20M
20.00 mi14:04:022:44:418:1412:16
9:02
#14809
21M
21.00 mi14:13:582:54:378:199:56
9:56
#14989
35K
21.75 mi14:20:193:00:588:196:21
8:29
#14990
23M
23.00 mi14:31:303:12:098:2111:11
8:56
#15014
24M
24.00 mi14:40:073:20:468:228:37
8:37
#14996
40K
24.85 mi14:47:293:28:088:227:22
8:37
#14941
25.2M
25.20 mi14:50:463:31:258:233:17
9:31
#14933
Finish
26.22 mi14:59:113:39:508:238:25
8:16
#14907
Faster pace
Steady pace
Slower pace
Est.Checkpoint not recorded (estimated)
~Segment time uses estimated prior

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi137833895389514134(Top 53%)4170(Top 37%)4170(Top 85%)
10K6.21 mi3.10 mi12670+11133252+6433252+64311558(Top 43%)2634(Top 23%)2634(Top 54%)
15K9.32 mi3.11 mi13163-4933564-3123564-31214134(Top 53%)4170(Top 37%)4170(Top 85%)
20K12.43 mi3.11 mi13730-5673925-3613925-36115330(Top 58%)4921(Top 43%)4921(Top 101%)
Half13.11 mi0.68 mi13769-393941-163941-1614732(Top 55%)4528(Top 40%)4528(Top 93%)
25K15.53 mi2.42 mi14196-4274230-2894230-28916083(Top 60%)5490(Top 48%)5490(Top 112%)
30K18.64 mi3.11 mi14638-4424520-2904520-29016441(Top 62%)5747(Top 50%)5747(Top 118%)
20M20.00 mi1.36 mi14809-1714644-1244644-12416686(Top 63%)5959(Top 52%)5959(Top 122%)
21M21.00 mi1.00 mi14989-1804786-1424786-14217785(Top 67%)6624(Top 58%)6624(Top 136%)
35K21.75 mi0.75 mi14990-14807-214807-2115256(Top 57%)5260(Top 46%)5260(Top 108%)
23M23.00 mi1.25 mi15014-244847-404847-4015704(Top 59%)5573(Top 49%)5573(Top 114%)
24M24.00 mi1.00 mi14996+184853-64853-615117(Top 57%)5309(Top 46%)5309(Top 109%)
40K24.85 mi0.85 mi14941+554844+94844+914114(Top 53%)4824(Top 42%)4824(Top 99%)
25.2M25.20 mi0.35 mi14933+84846-24846-215319(Top 58%)5480(Top 48%)5480(Top 112%)
Finish26.22 mi1.02 mi14907+264855-94855-913872(Top 52%)4675(Top 41%)4675(Top 96%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 53%
×21story building
+97ft-345ft

Overall

14134

Females

4170

F18-39

4170

5K→10K

3.1 - 6.2 mi

Top 43%
×5story building
+79ft-138ft

Overall

11558

Females

2634

F18-39

2634

10K→15K

6.2 - 9.3 mi

Top 53%
×3story building
+67ft-78ft

Overall

14134

Females

4170

F18-39

4170

15K→20K

9.3 - 12.4 mi

Top 58%
×5story building
+106ft-86ft

Overall

15330

Females

4921

F18-39

4921

20K→Half

12.4 - 13.1 mi

Top 55%
×2story building
+19ft-37ft

Overall

14732

Females

4528

F18-39

4528

Half→25K

13.1 - 15.5 mi

Top 60%
×4story building
+66ft-88ft

Overall

16083

Females

5490

F18-39

5490

25K→30K

15.5 - 18.6 mi

Top 62%
×9story building
+181ft-148ft

Overall

16441

Females

5747

F18-39

5747

30K→20M

18.6 - 20.0 mi

Top 63%
×5story building
+64ft-50ft

Overall

16686

Females

5959

F18-39

5959

20M→21M

20.0 - 21.0 mi

Top 67%
×8story building
+106ft-24ft

Overall

17785

Females

6624

F18-39

6624

21M→35K

21.0 - 21.8 mi

Top 57%
×7story building
+17ft-86ft

Overall

15256

Females

5260

F18-39

5260

35K→23M

21.8 - 23.0 mi

Top 59%
×5story building
+23ft-63ft

Overall

15704

Females

5573

F18-39

5573

23M→24M

23.0 - 24.0 mi

Top 57%
×6story building
+12ft-82ft

Overall

15117

Females

5309

F18-39

5309

24M→40K

24.0 - 24.9 mi

Top 53%
×1story
+6ft-20ft

Overall

14114

Females

4824

F18-39

4824

40K→25.2M

24.9 - 25.2 mi

Top 58%
×1story
+13ft-16ft

Overall

15319

Females

5480

F18-39

5480

25.2M→Finish

25.2 - 26.2 mi

Top 52%
×2story building
+22ft-21ft

Overall

13872

Females

4675

F18-39

4675

Passing Analysis

Category:
Athletes Passed
1907
Passed By
3031
Net Change
-1124
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#13783
5K → 10K116148+1113#13783#12670
10K → 15K64557-493#12670#13163
15K → 20K69636-567#13163#13730
20K → Half1655-39#13730#13769
Half → 25K48475-427#13769#14196
25K → 30K75517-442#14196#14638
30K → 20M39210-171#14638#14809
20M → 21M40220-180#14809#14989
21M → 35K5556-1#14989#14990
35K → 23M6993-24#14990#15014
23M → 24M7052+18#15014#14996
24M → 40K8934+55#14996#14941
40K → 25.2M3426+8#14941#14933
25.2M → Finish7852+26#14933#14907
TOTALS19073031-1124
📊

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
Share Feedback

Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing