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BOSTON MARATHON 2023

Grace Birch

Bib: 14659•F

MA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 38%
Gender (Female)
#0 / 11423
Top 19%
Division (F18-39)
#0 / 4884
Top 33%
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
7:42/mi
23:56
↑ 97↓ 3451.5%
10K· 6.21 mi
7:55/mi
48:33
↑ 79↓ 1380.4%
15K· 9.32 mi
7:44/mi
1:12:36
↑ 67↓ 78
20K· 12.43 mi
7:40/mi
1:36:25
↑ 106↓ 860.1%
Half· 13.11 mi
7:23/mi
1:41:27
↑ 19↓ 370.5%
25K· 15.53 mi
7:43/mi
2:00:09
↑ 66↓ 880.2%
30K· 18.64 mi
7:45/mi
2:24:13
↑ 181↓ 1480.2%
20M
7:32/mi
2:34:27
↑ 64↓ 500.2%
21M
7:47/mi
2:42:14
↑ 106↓ 241.6%
35K· 21.75 mi
7:06/mi
2:47:33
↑ 17↓ 861.7%
23M
7:46/mi
2:57:17
↑ 23↓ 630.6%
24M
7:48/mi
3:05:05
↓ 821.3%
40K· 24.85 mi
7:55/mi
3:11:51
↓ 200.3%
25.2M
8:25/mi
3:14:45
↑ 13↓ 160.2%
Finish· 26.22 mi
8:06/mi
3:23:00
↑ 22↓ 21

The Course

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Half Splits

1st Half· via Half⚖️ Balanced
Distance13.11 mi
Time1:41:27
Pace7:44 /mi
2nd Half⚖️ Balanced
Distance13.11 mi
Time1:41:33
Pace7:45 /mi
📊Even Split: Consistent pacing between halves

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:53:0123:567:4223:56
7:42
-
10K
6.21 mi11:17:3848:337:4924:37
7:55
+0:13
15K
9.32 mi11:41:411:12:367:4724:03
7:44
-0:11
20K
12.43 mi12:05:301:36:257:4623:49
7:40
-0:04
Half
13.11 mi12:10:321:41:277:445:02
7:23
-0:17
25K
15.53 mi12:29:142:00:097:4418:42
7:43
+0:20
30K
18.64 mi12:53:182:24:137:4424:04
7:45
+0:02
20M
20.00 mi13:03:322:34:277:4310:14
7:32
-0:13
21M
21.00 mi13:11:192:42:147:447:47
7:47
+0:15
35K
21.75 mi13:16:382:47:337:425:19
7:06
-0:41
23M
23.00 mi13:26:222:57:177:429:44
7:46
+0:40
24M
24.00 mi13:34:103:05:057:437:48
7:48
+0:02
40K
24.85 mi13:40:563:11:517:436:46
7:55
+0:07
25.2M
25.20 mi13:43:503:14:457:442:54
8:25
+0:30
Finish
26.22 mi13:52:053:23:007:458:15
8:06
-0:19

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

7:06 /mi

Average Pace

7:45 /mi

Slowest Pace

8:25 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

2:40:28

79% of race

Time at Steady Pace

39:38

20% of race

Time at Slower Pace

2:54

1% of race

Average Pace: 7:45 /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 mi10:53:0123:567:4223:56
7:42
#11491
10K
6.21 mi11:17:3848:337:4924:37
7:55
#12819
15K
9.32 mi11:41:411:12:367:4724:03
7:44
#12575
20K
12.43 mi12:05:301:36:257:4623:49
7:40
#12035
Half
13.11 mi12:10:321:41:277:445:02
7:23
#11889
25K
15.53 mi12:29:142:00:097:4418:42
7:43
#11562
30K
18.64 mi12:53:182:24:137:4424:04
7:45
#11054
20M
20.00 mi13:03:322:34:277:4310:14
7:32
#10728
21M
21.00 mi13:11:192:42:147:447:47
7:47
#10433
35K
21.75 mi13:16:382:47:337:425:19
7:06
#10234
23M
23.00 mi13:26:222:57:177:429:44
7:46
#10074
24M
24.00 mi13:34:103:05:057:437:48
7:48
#10038
40K
24.85 mi13:40:563:11:517:436:46
7:55
#9992
25.2M
25.20 mi13:43:503:14:457:442:54
8:25
#9953
Finish
26.22 mi13:52:053:23:007:458:15
8:06
#10052
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi114912587258712208(Top 46%)3014(Top 26%)3014(Top 62%)
10K6.21 mi3.10 mi12819-13283325-7383325-73814179(Top 53%)4157(Top 36%)4157(Top 85%)
15K9.32 mi3.11 mi12575+2443214+1113214+11112208(Top 46%)3014(Top 26%)3014(Top 62%)
20K12.43 mi3.11 mi12035+5402931+2832931+28310645(Top 40%)2225(Top 19%)2225(Top 46%)
Half13.11 mi0.68 mi11889+1462848+832848+839330(Top 35%)1622(Top 14%)1622(Top 33%)
25K15.53 mi2.42 mi11562+3272671+1772671+17710406(Top 39%)2183(Top 19%)2183(Top 45%)
30K18.64 mi3.11 mi11054+5082432+2392432+2398986(Top 34%)1705(Top 15%)1705(Top 35%)
20M20.00 mi1.36 mi10728+3262299+1332299+1337032(Top 26%)1040(Top 9%)1040(Top 21%)
21M21.00 mi1.00 mi10433+2952167+1322167+1326119(Top 23%)846(Top 7%)846(Top 17%)
35K21.75 mi0.75 mi10234+1992079+882079+886016(Top 23%)786(Top 7%)786(Top 16%)
23M23.00 mi1.25 mi10074+1602034+452034+458267(Top 31%)1705(Top 15%)1705(Top 35%)
24M24.00 mi1.00 mi10038+362049-152049-159817(Top 37%)2502(Top 22%)2502(Top 51%)
40K24.85 mi0.85 mi9992+462060-112060-119471(Top 36%)2386(Top 21%)2386(Top 49%)
25.2M25.20 mi0.35 mi9953+392056+42056+49031(Top 34%)2257(Top 20%)2257(Top 46%)
Finish26.22 mi1.02 mi10052-992120-642120-6412754(Top 48%)4078(Top 36%)4078(Top 83%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 46%
×21story building
+97ft-345ft

Overall

12208

Females

3014

F18-39

3014

5K→10K

3.1 - 6.2 mi

Top 53%
×5story building
+79ft-138ft

Overall

14179

Females

4157

F18-39

4157

10K→15K

6.2 - 9.3 mi

Top 46%
×3story building
+67ft-78ft

Overall

12208

Females

3014

F18-39

3014

15K→20K

9.3 - 12.4 mi

Top 40%
×5story building
+106ft-86ft

Overall

10645

Females

2225

F18-39

2225

20K→Half

12.4 - 13.1 mi

Top 35%
×2story building
+19ft-37ft

Overall

9330

Females

1622

F18-39

1622

Half→25K

13.1 - 15.5 mi

Top 39%
×4story building
+66ft-88ft

Overall

10406

Females

2183

F18-39

2183

25K→30K

15.5 - 18.6 mi

Top 34%
×9story building
+181ft-148ft

Overall

8986

Females

1705

F18-39

1705

30K→20M

18.6 - 20.0 mi

Top 26%
×5story building
+64ft-50ft

Overall

7032

Females

1040

F18-39

1040

20M→21M

20.0 - 21.0 mi

Top 23%
×8story building
+106ft-24ft

Overall

6119

Females

846

F18-39

846

21M→35K

21.0 - 21.8 mi

Top 23%
×7story building
+17ft-86ft

Overall

6016

Females

786

F18-39

786

35K→23M

21.8 - 23.0 mi

Top 31%
×5story building
+23ft-63ft

Overall

8267

Females

1705

F18-39

1705

23M→24M

23.0 - 24.0 mi

Top 37%
×6story building
+12ft-82ft

Overall

9817

Females

2502

F18-39

2502

24M→40K

24.0 - 24.9 mi

Top 36%
×1story
+6ft-20ft

Overall

9471

Females

2386

F18-39

2386

40K→25.2M

24.9 - 25.2 mi

Top 34%
×1story
+13ft-16ft

Overall

9031

Females

2257

F18-39

2257

25.2M→Finish

25.2 - 26.2 mi

Top 48%
×2story building
+22ft-21ft

Overall

12754

Females

4078

F18-39

4078

Passing Analysis

Category:
Athletes Passed
3206*
Passed By
1765
Net Change
+1439
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#11491
5K → 10K331361-1328#11491#12819
10K → 15K349105+244#12819#12575
15K → 20K55515+540#12575#12035
20K → Half1460+146#12035#11889
Half → 25K34215+327#11889#11562
25K → 30K52214+508#11562#11054
30K → 20M327*1+326#11054#10728
20M → 21M2950+295#10728#10433
21M → 35K1990+199#10433#10234
35K → 23M17515+160#10234#10074
23M → 24M8649+36#10074#10038
24M → 40K85*39+46#10038#9992
40K → 25.2M4910+39#9992#9953
25.2M → Finish43141-99#9953#10052
TOTALS3206*1765+1439

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

📊

Passing Visuals

Category:
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🔄Passing Circle

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🌊Position Flow

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🏃Race Lanes

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Public Race Data

Boston Athletic Association

Boston Athletic Association

Mika Timing

Mika Timing