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BOSTON MARATHON 2026

Yi Zhang

Bib: 21821•F

MA

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0:00
0:00
/ mi
Masters
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Overall
#0 / 29021
Gender (Female)
#0 / 12578
Top 45%
Masters (Masters Women)
#0 / 6862
Top 31%
Age Group (F45-49)
#0 / 1786
Top 38%
Race Day Weather
51°/41°F
overcast clouds

Race Timeline and Course Information

Your journey through the course with elevation, pacing, and checkpoint details

⏱️ Race Timeline

Watch your race unfold from start to finish

Start
0:00:00
Race begins
5K
25:07
3.11 mi
Rank: #17524
Start → 5K
25:07 | 8:06/mi
10K
49:58
6.21 mi
Rank: #17383 (+141)
5K → 10K
24:51 | 8:00/mi
15K
1:14:54
9.32 mi
Rank: #17325 (+58)
10K → 15K
24:56 | 8:02/mi
20K
1:39:57
12.43 mi
Rank: #17121 (+204)
15K → 20K
25:03 | 8:04/mi
HALF
1:45:23
13.11 mi
Rank: #17107 (+14)
20K → HALF
5:26 | 7:59/mi
25K
2:05:07
15.53 mi
Rank: #16953 (+154)
HALF → 25K
19:44 | 8:09/mi
30K
2:30:51
18.64 mi
Rank: #16661 (+292)
25K → 30K
25:44 | 8:17/mi
20M
2:42:12
20.00 mi
Rank: #16539 (+122)
30K → 20M
11:21 | 8:22/mi
21M
2:50:59
21.00 mi
Rank: #16405 (+134)
20M → 21M
8:47 | 8:47/mi
35K
2:57:24
21.75 mi
Rank: #16444 (-39)
21M → 35K
6:25 | 8:35/mi
23M
3:07:56
23.00 mi
Rank: #16339 (+105)
35K → 23M
10:32 | 8:26/mi
24M
3:16:08
24.00 mi
Rank: #16260 (+79)
23M → 24M
8:12 | 8:12/mi
40K
3:23:18
24.85 mi
Rank: #16195 (+65)
24M → 40K
7:10 | 8:23/mi
25.2M
3:26:24
25.20 mi
Rank: #16163 (+32)
40K → 25.2M
3:06 | 9:00/mi
FINISH
3:34:38
26.22 mi
Rank: #16140 (+23)
25.2M → FINISH
8:14 | 8:05/mi

Splits & Pacing

Detailed breakdown of your race performance at each timing point

Half Splits

1st HalfFaster
via HALF
Distance13.11 mi
Time1:45:23
Pace8:03 /mi
2nd Half
Distance13.11 mi
Time1:49:15
Pace8:21 /mi
📊Positive Split: 3.7% slower second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi11:26:2025:078:0625:07
8:06
-
10K
6.21 mi11:51:1149:588:0324:51
8:00
-0:06
15K
9.32 mi12:16:071:14:548:0324:56
8:02
+0:02
20K
12.43 mi12:41:101:39:578:0325:03
8:04
+0:02
HALF
13.11 mi12:46:361:45:238:035:26
7:59
-0:05
25K
15.53 mi13:06:202:05:078:0419:44
8:09
+0:10
30K
18.64 mi13:32:042:30:518:0625:44
8:17
+0:08
20M
20.00 mi13:43:252:42:128:0711:21
8:22
+0:05
21M
21.00 mi13:52:122:50:598:098:47
8:47
+0:25
35K
21.75 mi13:58:372:57:248:106:25
8:35
-0:12
23M
23.00 mi14:09:093:07:568:1110:32
8:26
-0:09
24M
24.00 mi14:17:213:16:088:118:12
8:12
-0:14
40K
24.85 mi14:24:313:23:188:117:10
8:23
+0:11
25.2M
25.20 mi14:27:373:26:248:123:06
9:00
+0:37
FINISH
26.22 mi14:35:513:34:388:128:14
8:05
-0:55

Checkpoint Splits Visualizations

Explore your race data through different visual perspectives. Scroll to discover each visualization.

📈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

7:59 /mi

Average Pace

8:12 /mi

Slowest Pace

9:00 /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

3:22:45

94% of race

Time at Steady Pace

11:53

6% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 8:11 /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 mi11:26:2025:078:0625:07
8:06
#17524
10K
6.21 mi11:51:1149:588:0324:51
8:00
#17383
15K
9.32 mi12:16:071:14:548:0324:56
8:02
#17325
20K
12.43 mi12:41:101:39:578:0325:03
8:04
#17121
HALF
13.11 mi12:46:361:45:238:035:26
7:59
#17107
25K
15.53 mi13:06:202:05:078:0419:44
8:09
#16953
30K
18.64 mi13:32:042:30:518:0625:44
8:17
#16661
20M
20.00 mi13:43:252:42:128:0711:21
8:22
#16539
21M
21.00 mi13:52:122:50:598:098:47
8:47
#16405
35K
21.75 mi13:58:372:57:248:106:25
8:35
#16444
23M
23.00 mi14:09:093:07:568:1110:32
8:26
#16339
24M
24.00 mi14:17:213:16:088:118:12
8:12
#16260
40K
24.85 mi14:24:313:23:188:117:10
8:23
#16195
25.2M
25.20 mi14:27:373:26:248:123:06
9:00
#16163
FINISH
26.22 mi14:35:513:34:388:128:14
8:05
#16140
Faster pace
Steady pace
Slower pace

Rankings

Your position at each checkpoint and how you ranked in each segment

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF45-49Seg. OverallSeg. FemalesSeg. F45-49
5K3.11 mi3.11 mi175246225622517221(Top 59%)6035(Top 48%)6035(Top 338%)
10K6.21 mi3.10 mi17383+1416146+796146+7917229(Top 59%)6044(Top 48%)6044(Top 338%)
15K9.32 mi3.11 mi17325+586111+356111+3517221(Top 59%)6035(Top 48%)6035(Top 338%)
20K12.43 mi3.11 mi17121+2046001+1106001+11016600(Top 57%)5705(Top 45%)5705(Top 319%)
HALF13.11 mi0.68 mi17107+145992+95992+916941(Top 58%)5881(Top 47%)5881(Top 329%)
25K15.53 mi2.42 mi16953+1545914+785914+7816391(Top 56%)5644(Top 45%)5644(Top 316%)
30K18.64 mi3.11 mi16661+2925786+1285786+12815512(Top 53%)5254(Top 42%)5254(Top 294%)
20M20.00 mi1.36 mi16539+1225728+585728+5815288(Top 53%)5242(Top 42%)5242(Top 294%)
21M21.00 mi1.00 mi16405+1345671+575671+5714923(Top 51%)5104(Top 41%)5104(Top 286%)
35K21.75 mi0.75 mi16444-395697-265697-2618016(Top 62%)6890(Top 55%)6890(Top 386%)
23M23.00 mi1.25 mi16339+1055663+345663+3415213(Top 52%)5377(Top 43%)5377(Top 301%)
24M24.00 mi1.00 mi16260+795649+145649+1415116(Top 52%)5401(Top 43%)5401(Top 302%)
40K24.85 mi0.85 mi16195+655625+245625+2414986(Top 52%)5427(Top 43%)5427(Top 304%)
25.2M25.20 mi0.35 mi16163+325624+15624+114736(Top 51%)5305(Top 42%)5305(Top 297%)
FINISH26.22 mi1.02 mi16140+235635-115635-1115701(Top 54%)5787(Top 46%)5787(Top 324%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 59%
×21
+97ft-345ft

Overall

17221

Females

6035

F45-49

6035

5K→10K

3.1 - 6.2 mi

Top 59%
×5
+79ft-138ft

Overall

17229

Females

6044

F45-49

6044

10K→15K

6.2 - 9.3 mi

Top 59%
×3
+67ft-78ft

Overall

17221

Females

6035

F45-49

6035

15K→20K

9.3 - 12.4 mi

Top 57%
×5
+106ft-86ft

Overall

16600

Females

5705

F45-49

5705

20K→HALF

12.4 - 13.1 mi

Top 58%
×2
+19ft-37ft

Overall

16941

Females

5881

F45-49

5881

HALF→25K

13.1 - 15.5 mi

Top 56%
×4
+66ft-88ft

Overall

16391

Females

5644

F45-49

5644

25K→30K

15.5 - 18.6 mi

Top 53%
×9
+181ft-148ft

Overall

15512

Females

5254

F45-49

5254

30K→20M

18.6 - 20.0 mi

Top 53%
×5
+64ft-50ft

Overall

15288

Females

5242

F45-49

5242

20M→21M

20.0 - 21.0 mi

Top 51%
×8
+106ft-24ft

Overall

14923

Females

5104

F45-49

5104

21M→35K

21.0 - 21.8 mi

Top 62%
×7
+17ft-86ft

Overall

18016

Females

6890

F45-49

6890

35K→23M

21.8 - 23.0 mi

Top 52%
×5
+23ft-63ft

Overall

15213

Females

5377

F45-49

5377

23M→24M

23.0 - 24.0 mi

Top 52%
×6
+12ft-82ft

Overall

15116

Females

5401

F45-49

5401

24M→40K

24.0 - 24.9 mi

Top 52%
×1
+6ft-20ft

Overall

14986

Females

5427

F45-49

5427

40K→25.2M

24.9 - 25.2 mi

Top 51%
×1
+13ft-16ft

Overall

14736

Females

5305

F45-49

5305

25.2M→FINISH

25.2 - 26.2 mi

Top 54%
×2
+22ft-21ft

Overall

15701

Females

5787

F45-49

5787

Passing

Athletes you passed and who passed you throughout the race

Passing Analysis

Category:
Athletes Passed
2288*
Passed By
904
Net Change
+1384
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#17524
5K → 10K341*200+141#17524#17383
10K → 15K228*170+58#17383#17325
15K → 20K280*76+204#17325#17121
20K → HALF4026+14#17121#17107
HALF → 25K212*58+154#17107#16953
25K → 30K351*59+292#16953#16661
30K → 20M14725+122#16661#16539
20M → 21M16228+134#16539#16405
21M → 35K5594-39#16405#16444
35K → 23M14944+105#16444#16339
23M → 24M10728+79#16339#16260
24M → 40K9833+65#16260#16195
40K → 25.2M5018+32#16195#16163
25.2M → FINISH6845+23#16163#16140
TOTALS2288*904+1384

* Includes athletes who did not complete a segment (DNF/DNQ).

📊

Passing Analysis Visualizations

Explore your passing analysis through 5 different visualizations. Scroll to discover each one.

Time:
Category:

📈Position Graph

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🎨Heatmap Timeline

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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Qualifying & Age Grade

See how your performance stacks up against qualifying standards

OTQ

Olympic Trials Qualifying analysis available

Activity Data

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Export & Support

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing