Boston Marathon logo
BOSTON MARATHON 2023

Yi Zhang

Bib: 20846•F

MA

0:00
0:00
/ mi
Masters
Be the first to cheer!
Overall
#0 / 26622
Gender (Female)
#0 / 11423
Masters (Masters Women)
#0 / 6539
Top 44%
Division (F40-44)
#0 / 1878
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
25:31
Rank: #15579
Start → 5K
25:31 | 8:13/mi
10K· 6.21 mi
50:36
Rank: #15422 (+157)
5K → 10K
25:05 | 8:04/mi
15K· 9.32 mi
1:16:43
Rank: #16052 (-630)
10K → 15K
26:07 | 8:24/mi
20K· 12.43 mi
1:43:08
Rank: #16279 (-227)
15K → 20K
26:25 | 8:30/mi
Half· 13.11 mi
1:48:50
Rank: #16296 (-17)
20K → Half
5:42 | 8:21/mi
25K· 15.53 mi
2:09:58
Rank: #16519 (-223)
Half → 25K
21:08 | 8:43/mi
30K· 18.64 mi
2:38:13
Rank: #16697 (-178)
25K → 30K
28:15 | 9:06/mi
20M
2:50:44
Rank: #16755 (-58)
30K → 20M
12:31 | 9:13/mi
21M
3:00:41
Rank: #16825 (-70)
20M → 21M
9:57 | 9:57/mi
35K· 21.75 mi
3:07:35
Rank: #16909 (-84)
21M → 35K
6:54 | 9:13/mi
23M
3:19:05
Rank: #16919 (-10)
35K → 23M
11:30 | 9:11/mi
24M
3:27:57
Rank: #16901 (+18)
23M → 24M
8:52 | 8:52/mi
40K· 24.85 mi
3:35:48
Rank: #16901
24M → 40K
7:51 | 9:11/mi
25.2M
3:39:13
Rank: #16904 (-3)
40K → 25.2M
3:25 | 9:54/mi
Finish· 26.22 mi
3:48:20
Rank: #16938 (-34)
25.2M → Finish
9:07 | 8:57/mi

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
Time1:48:50
Pace8:18 /mi
2nd Half
Distance13.11 mi
Time1:59:30
Pace9:07 /mi
📊Positive Split: 9.8% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:17:3225:318:1325:31
8:13
-
10K
6.21 mi11:42:3750:368:0925:05
8:04
-0:09
15K
9.32 mi12:08:441:16:438:1426:07
8:24
+0:20
20K
12.43 mi12:35:091:43:088:1826:25
8:30
+0:06
Half
13.11 mi12:40:511:48:508:185:42
8:21
-0:09
25K
15.53 mi13:01:592:09:588:2221:08
8:43
+0:22
30K
18.64 mi13:30:142:38:138:2928:15
9:06
+0:23
20M
20.00 mi13:42:452:50:448:3212:31
9:13
+0:07
21M
21.00 mi13:52:423:00:418:369:57
9:57
+0:44
35K
21.75 mi13:59:363:07:358:386:54
9:13
-0:44
23M
23.00 mi14:11:063:19:058:3911:30
9:11
-0:02
24M
24.00 mi14:19:583:27:578:408:52
8:52
-0:19
40K
24.85 mi14:27:493:35:488:417:51
9:11
+0:19
25.2M
25.20 mi14:31:143:39:138:423:25
9:54
+0:43
Finish
26.22 mi14:40:213:48:208:439:07
8:57
-0:57

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

8:04 /mi

Average Pace

8:43 /mi

Slowest Pace

9:57 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:48:50

48% of race

Time at Steady Pace

1:46:08

46% of race

Time at Slower Pace

13:22

6% of race

Average Pace: 8:43 /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 mi11:17:3225:318:1325:31
8:13
#15579
10K
6.21 mi11:42:3750:368:0925:05
8:04
#15422
15K
9.32 mi12:08:441:16:438:1426:07
8:24
#16052
20K
12.43 mi12:35:091:43:088:1826:25
8:30
#16279
Half
13.11 mi12:40:511:48:508:185:42
8:21
#16296
25K
15.53 mi13:01:592:09:588:2221:08
8:43
#16519
30K
18.64 mi13:30:142:38:138:2928:15
9:06
#16697
20M
20.00 mi13:42:452:50:448:3212:31
9:13
#16755
21M
21.00 mi13:52:423:00:418:369:57
9:57
#16825
35K
21.75 mi13:59:363:07:358:386:54
9:13
#16909
23M
23.00 mi14:11:063:19:058:3911:30
9:11
#16919
24M
24.00 mi14:19:583:27:578:408:52
8:52
#16901
40K
24.85 mi14:27:493:35:488:417:51
9:11
#16901
25.2M
25.20 mi14:31:143:39:138:423:25
9:54
#16904
Finish
26.22 mi14:40:213:48:208:439:07
8:57
#16938
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF40-44Seg. OverallSeg. FemalesSeg. F40-44
5K3.11 mi3.11 mi155795024502417194(Top 65%)6044(Top 53%)6044(Top 322%)
10K6.21 mi3.10 mi15422+1574917+1074917+10715342(Top 58%)4880(Top 43%)4880(Top 260%)
15K9.32 mi3.11 mi16052-6305318-4015318-40117194(Top 65%)6044(Top 53%)6044(Top 322%)
20K12.43 mi3.11 mi16279-2275474-1565474-15616882(Top 63%)5865(Top 51%)5865(Top 312%)
Half13.11 mi0.68 mi16296-175487-135487-1316905(Top 64%)5851(Top 51%)5851(Top 312%)
25K15.53 mi2.42 mi16519-2235650-1635650-16317471(Top 66%)6264(Top 55%)6264(Top 334%)
30K18.64 mi3.11 mi16697-1785797-1475797-14717656(Top 66%)6443(Top 56%)6443(Top 343%)
20M20.00 mi1.36 mi16755-585839-425839-4217604(Top 66%)6516(Top 57%)6516(Top 347%)
21M21.00 mi1.00 mi16825-705878-395878-3917870(Top 67%)6678(Top 58%)6678(Top 356%)
35K21.75 mi0.75 mi16909-845936-585936-5818840(Top 71%)7294(Top 64%)7294(Top 388%)
23M23.00 mi1.25 mi16919-105973-375973-3716995(Top 64%)6287(Top 55%)6287(Top 335%)
24M24.00 mi1.00 mi16901+185982-95982-916611(Top 62%)6141(Top 54%)6141(Top 327%)
40K24.85 mi0.85 mi169016004-226004-2217039(Top 64%)6424(Top 56%)6424(Top 342%)
25.2M25.20 mi0.35 mi16904-36016-126016-1217056(Top 64%)6448(Top 56%)6448(Top 343%)
Finish26.22 mi1.02 mi16938-346043-276043-2717720(Top 67%)6764(Top 59%)6764(Top 360%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 65%
×21stories
+97ft-345ft

Overall

17194

Females

6044

F40-44

6044

5K→10K

3.1 - 6.2 mi

Top 58%
×5stories
+79ft-138ft

Overall

15342

Females

4880

F40-44

4880

10K→15K

6.2 - 9.3 mi

Top 65%
×3stories
+67ft-78ft

Overall

17194

Females

6044

F40-44

6044

15K→20K

9.3 - 12.4 mi

Top 63%
×5stories
+106ft-86ft

Overall

16882

Females

5865

F40-44

5865

20K→Half

12.4 - 13.1 mi

Top 64%
×2stories
+19ft-37ft

Overall

16905

Females

5851

F40-44

5851

Half→25K

13.1 - 15.5 mi

Top 66%
×4stories
+66ft-88ft

Overall

17471

Females

6264

F40-44

6264

25K→30K

15.5 - 18.6 mi

Top 66%
×9stories
+181ft-148ft

Overall

17656

Females

6443

F40-44

6443

30K→20M

18.6 - 20.0 mi

Top 66%
×5stories
+64ft-50ft

Overall

17604

Females

6516

F40-44

6516

20M→21M

20.0 - 21.0 mi

Top 67%
×8stories
+106ft-24ft

Overall

17870

Females

6678

F40-44

6678

21M→35K

21.0 - 21.8 mi

Top 71%
×7stories
+17ft-86ft

Overall

18840

Females

7294

F40-44

7294

35K→23M

21.8 - 23.0 mi

Top 64%
×5stories
+23ft-63ft

Overall

16995

Females

6287

F40-44

6287

23M→24M

23.0 - 24.0 mi

Top 62%
×6stories
+12ft-82ft

Overall

16611

Females

6141

F40-44

6141

24M→40K

24.0 - 24.9 mi

Top 64%
×1story
+6ft-20ft

Overall

17039

Females

6424

F40-44

6424

40K→25.2M

24.9 - 25.2 mi

Top 64%
×1story
+13ft-16ft

Overall

17056

Females

6448

F40-44

6448

25.2M→Finish

25.2 - 26.2 mi

Top 67%
×2stories
+22ft-21ft

Overall

17720

Females

6764

F40-44

6764

Passing Analysis

Category:
Athletes Passed
1209
Passed By
2568
Net Change
-1359
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#15579
5K → 10K384227+157#15579#15422
10K → 15K49679-630#15422#16052
15K → 20K105332-227#16052#16279
20K → Half3552-17#16279#16296
Half → 25K73296-223#16296#16519
25K → 30K126304-178#16519#16697
30K → 20M66124-58#16697#16755
20M → 21M56126-70#16755#16825
21M → 35K25109-84#16825#16909
35K → 23M8393-10#16909#16919
23M → 24M6749+18#16919#16901
24M → 40K61610#16901#16901
40K → 25.2M2730-3#16901#16904
25.2M → Finish5286-34#16904#16938
TOTALS12092568-1359
📊

Passing Visuals

Category:
Loading...

🔥Passing Intensity

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