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BOSTON MARATHON 2023

Brenna Gray

Bib: 12905•F

IA

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 24%
Gender (Female)
#0 / 11423
Top 6%
Division (F18-39)
#0 / 4884
Top 11%
Race Day Weather
49°/39°F
light intensity drizzle

⏱️ Race Timeline

Start
0:00:00
Race begins
5K· 3.11 mi
23:35
Rank: #10451
Start → 5K
23:35 | 7:35/mi
10K· 6.21 mi
46:44
Rank: #10230 (+221)
5K → 10K
23:09 | 7:27/mi
15K· 9.32 mi
1:09:41
Rank: #9834 (+396)
10K → 15K
22:57 | 7:23/mi
20K· 12.43 mi
1:32:23
Rank: #9277 (+557)
15K → 20K
22:42 | 7:18/mi
Half· 13.11 mi
1:37:17
Rank: #9179 (+98)
20K → Half
4:54 | 7:11/mi
25K· 15.53 mi
1:54:40
Rank: #8688 (+491)
Half → 25K
17:23 | 7:10/mi
30K· 18.64 mi
2:16:57
Rank: #7991 (+697)
25K → 30K
22:17 | 7:10/mi
20M
2:26:34
Rank: #7653 (+338)
30K → 20M
9:37 | 7:05/mi
21M
2:33:56
Rank: #7391 (+262)
20M → 21M
7:22 | 7:22/mi
35K· 21.75 mi
2:38:55
Rank: #7214 (+177)
21M → 35K
4:59 | 6:40/mi
23M
2:47:44
Rank: #6951 (+263)
35K → 23M
8:49 | 7:03/mi
24M
2:54:28
Rank: #6749 (+202)
23M → 24M
6:44 | 6:44/mi
40K· 24.85 mi
3:00:19
Rank: #6551 (+198)
24M → 40K
5:51 | 6:51/mi
25.2M
3:02:49
Rank: #6472 (+79)
40K → 25.2M
2:30 | 7:15/mi
Finish· 26.22 mi
3:09:31
Rank: #6307 (+165)
25.2M → Finish
6:42 | 6:34/mi

The Course

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Half Splits

1st Half· via Half
Distance13.11 mi
Time1:37:17
Pace7:25 /mi
2nd Half✓ Faster
Distance13.11 mi
Time1:32:14
Pace7:02 /mi
📊Negative Split: 5.2% faster second half

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:51:2423:357:3523:35
7:35
-
10K
6.21 mi11:14:3346:447:3123:09
7:27
-0:08
15K
9.32 mi11:37:301:09:417:2922:57
7:23
-0:04
20K
12.43 mi12:00:121:32:237:2622:42
7:18
-0:05
Half
13.11 mi12:05:061:37:177:254:54
7:11
-0:07
25K
15.53 mi12:22:291:54:407:2317:23
7:10
-0:01
30K
18.64 mi12:44:462:16:577:2122:17
7:10
0:00
20M
20.00 mi12:54:232:26:347:209:37
7:05
-0:05
21M
21.00 mi13:01:452:33:567:207:22
7:22
+0:17
35K
21.75 mi13:06:442:38:557:184:59
6:40
-0:42
23M
23.00 mi13:15:332:47:447:188:49
7:03
+0:23
24M
24.00 mi13:22:172:54:287:166:44
6:44
-0:19
40K
24.85 mi13:28:083:00:197:155:51
6:51
+0:07
25.2M
25.20 mi13:30:383:02:497:152:30
7:15
+0:24
Finish
26.22 mi13:37:203:09:317:146:42
6:34
-0:41

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

6:34 /mi

Average Pace

7:14 /mi

Slowest Pace

7:35 /mi

Loading chart...
Fastest
Middle
Slowest
Average

📊Segments

Segment Time Comparison

Time at Faster Pace

1:27:16

46% of race

Time at Steady Pace

1:42:15

54% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:14 /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 mi10:51:2423:357:3523:35
7:35
#10451
10K
6.21 mi11:14:3346:447:3123:09
7:27
#10230
15K
9.32 mi11:37:301:09:417:2922:57
7:23
#9834
20K
12.43 mi12:00:121:32:237:2622:42
7:18
#9277
Half
13.11 mi12:05:061:37:177:254:54
7:11
#9179
25K
15.53 mi12:22:291:54:407:2317:23
7:10
#8688
30K
18.64 mi12:44:462:16:577:2122:17
7:10
#7991
20M
20.00 mi12:54:232:26:347:209:37
7:05
#7653
21M
21.00 mi13:01:452:33:567:207:22
7:22
#7391
35K
21.75 mi13:06:442:38:557:184:59
6:40
#7214
23M
23.00 mi13:15:332:47:447:188:49
7:03
#6951
24M
24.00 mi13:22:172:54:287:166:44
6:44
#6749
40K
24.85 mi13:28:083:00:197:155:51
6:51
#6551
25.2M
25.20 mi13:30:383:02:497:152:30
7:15
#6472
Finish
26.22 mi13:37:203:09:317:146:42
6:34
#6307
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi10451205620569232(Top 35%)1527(Top 13%)1527(Top 31%)
10K6.21 mi3.10 mi10230+2211938+1181938+11810083(Top 38%)1857(Top 16%)1857(Top 38%)
15K9.32 mi3.11 mi9834+3961754+1841754+1849232(Top 35%)1527(Top 13%)1527(Top 31%)
20K12.43 mi3.11 mi9277+5571550+2041550+2047834(Top 29%)1047(Top 9%)1047(Top 21%)
Half13.11 mi0.68 mi9179+981507+431507+437770(Top 29%)990(Top 9%)990(Top 20%)
25K15.53 mi2.42 mi8688+4911328+1791328+1796513(Top 24%)698(Top 6%)698(Top 14%)
30K18.64 mi3.11 mi7991+6971111+2171111+2175354(Top 20%)469(Top 4%)469(Top 10%)
20M20.00 mi1.36 mi7653+3381007+1041007+1044511(Top 17%)370(Top 3%)370(Top 8%)
21M21.00 mi1.00 mi7391+262937+70937+704011(Top 15%)317(Top 3%)317(Top 6%)
35K21.75 mi0.75 mi7214+177882+55882+553402(Top 13%)245(Top 2%)245(Top 5%)
23M23.00 mi1.25 mi6951+263829+53829+534014(Top 15%)320(Top 3%)320(Top 7%)
24M24.00 mi1.00 mi6749+202779+50779+503332(Top 13%)260(Top 2%)260(Top 5%)
40K24.85 mi0.85 mi6551+198740+39740+393065(Top 12%)252(Top 2%)252(Top 5%)
25.2M25.20 mi0.35 mi6472+79721+19721+192817(Top 11%)236(Top 2%)236(Top 5%)
Finish26.22 mi1.02 mi6307+165682+39682+392890(Top 11%)271(Top 2%)271(Top 6%)

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 35%
×21stories
+97ft-345ft

Overall

9232

Females

1527

F18-39

1527

5K→10K

3.1 - 6.2 mi

Top 38%
×5stories
+79ft-138ft

Overall

10083

Females

1857

F18-39

1857

10K→15K

6.2 - 9.3 mi

Top 35%
×3stories
+67ft-78ft

Overall

9232

Females

1527

F18-39

1527

15K→20K

9.3 - 12.4 mi

Top 29%
×5stories
+106ft-86ft

Overall

7834

Females

1047

F18-39

1047

20K→Half

12.4 - 13.1 mi

Top 29%
×2stories
+19ft-37ft

Overall

7770

Females

990

F18-39

990

Half→25K

13.1 - 15.5 mi

Top 24%
×4stories
+66ft-88ft

Overall

6513

Females

698

F18-39

698

25K→30K

15.5 - 18.6 mi

Top 20%
×9stories
+181ft-148ft

Overall

5354

Females

469

F18-39

469

30K→20M

18.6 - 20.0 mi

Top 17%
×5stories
+64ft-50ft

Overall

4511

Females

370

F18-39

370

20M→21M

20.0 - 21.0 mi

Top 15%
×8stories
+106ft-24ft

Overall

4011

Females

317

F18-39

317

21M→35K

21.0 - 21.8 mi

Top 13%
×7stories
+17ft-86ft

Overall

3402

Females

245

F18-39

245

35K→23M

21.8 - 23.0 mi

Top 15%
×5stories
+23ft-63ft

Overall

4014

Females

320

F18-39

320

23M→24M

23.0 - 24.0 mi

Top 13%
×6stories
+12ft-82ft

Overall

3332

Females

260

F18-39

260

24M→40K

24.0 - 24.9 mi

Top 12%
×1story
+6ft-20ft

Overall

3065

Females

252

F18-39

252

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

2817

Females

236

F18-39

236

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2stories
+22ft-21ft

Overall

2890

Females

271

F18-39

271

Passing Analysis

Category:
Athletes Passed
4398*
Passed By
254
Net Change
+4144
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#10451
5K → 10K427*206+221#10451#10230
10K → 15K431*35+396#10230#9834
15K → 20K563*6+557#9834#9277
20K → Half980+98#9277#9179
Half → 25K4910+491#9179#8688
25K → 30K6970+697#8688#7991
30K → 20M3391+338#7991#7653
20M → 21M2620+262#7653#7391
21M → 35K1781+177#7391#7214
35K → 23M2641+263#7214#6951
23M → 24M2031+202#6951#6749
24M → 40K1980+198#6749#6551
40K → 25.2M801+79#6551#6472
25.2M → Finish1672+165#6472#6307
TOTALS4398*254+4144

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

📊

Passing Visuals

Category:
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🔥Passing Intensity

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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