Boston Marathon logo
BOSTON MARATHON 2024

Xiaotun Zhang

Bib: 21079•F

WA

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

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K· 3.11 mi
26:11
Rank: #17383
Start → 5K
26:11 | 8:26/mi
10K· 6.21 mi
52:46
Rank: #17485 (-102)
5K → 10K
26:35 | 8:33/mi
15K· 9.32 mi
1:19:56
Rank: #17544 (-59)
10K → 15K
27:10 | 8:45/mi
20K· 12.43 mi
1:48:26
Rank: #17650 (-106)
15K → 20K
28:30 | 9:10/mi
Half· 13.11 mi
1:54:40
Rank: #17718 (-68)
20K → Half
6:14 | 9:08/mi
25K· 15.53 mi
2:17:52
Rank: #17718
Half → 25K
23:12 | 9:34/mi
30K· 18.64 mi
2:50:04
Rank: #17931 (-213)
25K → 30K
32:12 | 10:22/mi
20M
3:04:26
Rank: #17989 (-58)
30K → 20M
14:22 | 10:34/mi
21M
3:15:41
Rank: #17934 (+55)
20M → 21M
11:15 | 11:15/mi
35K· 21.75 mi
3:23:11
Rank: #17899 (+35)
21M → 35K
7:30 | 10:01/mi
23M
3:36:09
Rank: #17780 (+119)
35K → 23M
12:58 | 10:21/mi
24M
3:46:19
Rank: #17736 (+44)
23M → 24M
10:10 | 10:10/mi
40K· 24.85 mi
3:55:05
Rank: #17658 (+78)
24M → 40K
8:46 | 10:15/mi
25.2M
3:59:10
Rank: #17624 (+34)
40K → 25.2M
4:05 | 11:50/mi
Finish· 26.22 mi
4:09:25
Rank: #17632 (-8)
25.2M → Finish
10:15 | 10:04/mi

Course Map & Elevation

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
Time1:54:40
Pace8:45 /mi
2nd Half
Distance13.11 mi
Time2:14:45
Pace10:17 /mi
📊Positive Split: 17.5% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:23:0626:118:2626:11
8:26
-
10K
6.21 mi11:49:4152:468:3026:35
8:33
+0:07
15K
9.32 mi12:16:511:19:568:3527:10
8:45
+0:12
20K
12.43 mi12:45:211:48:268:4428:30
9:10
+0:25
Half
13.11 mi12:51:351:54:408:456:14
9:08
-0:02
25K
15.53 mi13:14:472:17:528:5223:12
9:34
+0:26
30K
18.64 mi13:46:592:50:049:0732:12
10:22
+0:48
20M
20.00 mi14:01:213:04:269:1314:22
10:34
+0:12
21M
21.00 mi14:12:363:15:419:1911:15
11:15
+0:41
35K
21.75 mi14:20:063:23:119:217:30
10:01
-1:14
23M
23.00 mi14:33:043:36:099:2412:58
10:21
+0:20
24M
24.00 mi14:43:143:46:199:2610:10
10:10
-0:11
40K
24.85 mi14:52:003:55:059:278:46
10:15
+0:05
25.2M
25.20 mi14:56:053:59:109:294:05
11:50
+1:35
Finish
26.22 mi15:06:204:09:259:3110:15
10:04
-1:46

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

8:26 /mi

Average Pace

9:31 /mi

Slowest Pace

11:50 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Bar length shows time spent in each segment. Colors mark your faster to slower segments, relative to your own pace.

Time at Faster Pace

2:17:52

55% of race

Time at Steady Pace

1:21:51

33% of race

Time at Slower Pace

29:42

12% of race

Average Pace: 9:31 /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

Enhanced split table showing pace trends through mini sparkline visualizations.

Overall Pace Trend

CheckpointDistanceTime of DayTimeAvg PaceSegmentPaceTrendRank
5K
3.11 mi11:23:0626:118:2626:11
8:26
#17383
10K
6.21 mi11:49:4152:468:3026:35
8:33
#17485
15K
9.32 mi12:16:511:19:568:3527:10
8:45
#17544
20K
12.43 mi12:45:211:48:268:4428:30
9:10
#17650
Half
13.11 mi12:51:351:54:408:456:14
9:08
#17718
25K
15.53 mi13:14:472:17:528:5223:12
9:34
#17718
30K
18.64 mi13:46:592:50:049:0732:12
10:22
#17931
20M
20.00 mi14:01:213:04:269:1314:22
10:34
#17989
21M
21.00 mi14:12:363:15:419:1911:15
11:15
#17934
35K
21.75 mi14:20:063:23:119:217:30
10:01
#17899
23M
23.00 mi14:33:043:36:099:2412:58
10:21
#17780
24M
24.00 mi14:43:143:46:199:2610:10
10:10
#17736
40K
24.85 mi14:52:003:55:059:278:46
10:15
#17658
25.2M
25.20 mi14:56:053:59:109:294:05
11:50
#17624
Finish
26.22 mi15:06:204:09:259:3110:15
10:04
#17632
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi173836396639617714(Top 69%)6551(Top 60%)6551(Top 374%)
10K6.21 mi3.10 mi17485-1026441-456441-4517615(Top 69%)6502(Top 60%)6502(Top 371%)
15K9.32 mi3.11 mi17544-596455-146455-1417714(Top 69%)6551(Top 60%)6551(Top 374%)
20K12.43 mi3.11 mi17650-1066544-896544-8918081(Top 71%)6748(Top 62%)6748(Top 385%)
Half13.11 mi0.68 mi17718-686589-456589-4518855(Top 74%)7245(Top 66%)7245(Top 413%)
25K15.53 mi2.42 mi177186609-206609-2017770(Top 70%)6694(Top 61%)6694(Top 382%)
30K18.64 mi3.11 mi17931-2136796-1876796-18718433(Top 72%)7269(Top 67%)7269(Top 415%)
20M20.00 mi1.36 mi17989-586859-636859-6318188(Top 71%)7299(Top 67%)7299(Top 416%)
21M21.00 mi1.00 mi17934+556858+16858+117014(Top 67%)6863(Top 63%)6863(Top 392%)
35K21.75 mi0.75 mi17899+356860-26860-217251(Top 68%)6970(Top 64%)6970(Top 398%)
23M23.00 mi1.25 mi17780+1196812+486812+4816611(Top 65%)6714(Top 61%)6714(Top 383%)
24M24.00 mi1.00 mi17736+446811+16811+116881(Top 66%)6887(Top 63%)6887(Top 393%)
40K24.85 mi0.85 mi17658+786794+176794+1715913(Top 62%)6459(Top 59%)6459(Top 368%)
25.2M25.20 mi0.35 mi17624+346792+26792+216983(Top 66%)7035(Top 64%)7035(Top 401%)
Finish26.22 mi1.02 mi17632-86823-316823-3118615(Top 73%)7789(Top 71%)7789(Top 444%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 69%
×21stories
+97ft-345ft

Overall

17714

Females

6551

F45-49

6551

5K→10K

3.1 - 6.2 mi

Top 69%
×5stories
+79ft-138ft

Overall

17615

Females

6502

F45-49

6502

10K→15K

6.2 - 9.3 mi

Top 69%
×3stories
+67ft-78ft

Overall

17714

Females

6551

F45-49

6551

15K→20K

9.3 - 12.4 mi

Top 71%
×5stories
+106ft-86ft

Overall

18081

Females

6748

F45-49

6748

20K→Half

12.4 - 13.1 mi

Top 74%
×2stories
+19ft-37ft

Overall

18855

Females

7245

F45-49

7245

Half→25K

13.1 - 15.5 mi

Top 70%
×4stories
+66ft-88ft

Overall

17770

Females

6694

F45-49

6694

25K→30K

15.5 - 18.6 mi

Top 72%
×9stories
+181ft-148ft

Overall

18433

Females

7269

F45-49

7269

30K→20M

18.6 - 20.0 mi

Top 71%
×5stories
+64ft-50ft

Overall

18188

Females

7299

F45-49

7299

20M→21M

20.0 - 21.0 mi

Top 67%
×8stories
+106ft-24ft

Overall

17014

Females

6863

F45-49

6863

21M→35K

21.0 - 21.8 mi

Top 68%
×7stories
+17ft-86ft

Overall

17251

Females

6970

F45-49

6970

35K→23M

21.8 - 23.0 mi

Top 65%
×5stories
+23ft-63ft

Overall

16611

Females

6714

F45-49

6714

23M→24M

23.0 - 24.0 mi

Top 66%
×6stories
+12ft-82ft

Overall

16881

Females

6887

F45-49

6887

24M→40K

24.0 - 24.9 mi

Top 62%
×1story
+6ft-20ft

Overall

15913

Females

6459

F45-49

6459

40K→25.2M

24.9 - 25.2 mi

Top 66%
×1story
+13ft-16ft

Overall

16983

Females

7035

F45-49

7035

25.2M→Finish

25.2 - 26.2 mi

Top 73%
×2stories
+22ft-21ft

Overall

18615

Females

7789

F45-49

7789

Passing Analysis

Category:
Athletes Passed
1863
Passed By
2112
Net Change
-249
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17383
5K → 10K238340-102#17383#17485
10K → 15K229288-59#17485#17544
15K → 20K226332-106#17544#17650
20K → Half2290-68#17650#17718
Half → 25K2072070#17718#17718
25K → 30K183396-213#17718#17931
30K → 20M94152-58#17931#17989
20M → 21M12974+55#17989#17934
21M → 35K7641+35#17934#17899
35K → 23M15839+119#17899#17780
23M → 24M8541+44#17780#17736
24M → 40K10325+78#17736#17658
40K → 25.2M4814+34#17658#17624
25.2M → Finish6573-8#17624#17632
TOTALS18632112-249
📊

Passing Visuals

Category:

📈Position Graph

Loading...

🎨Heatmap Timeline

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