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BOSTON MARATHON 2023

Heidi Santa Cruz

MA

Bib: 10874 F

0:00
0:00
/ mi
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Overall
#0 / 26622
Top 20%
Gender (Female)
#0 / 11423
Top 4%
Division (F18-39)
#0 / 4884
Top 8%
Race Day Weather
49°/39°F
light intensity drizzle

Race Timeline

Ribbon color based on
FasterSteadySlower· vs. your average pace
Start
0:00
Race begins
469 ft elev
5K· 3.11 mi
7:07/mi
22:06
↑ 97↓ 3451.5%
220 ft elev
10K· 6.21 mi
6:59/mi
43:49
↑ 79↓ 1380.4%
157 ft elev
15K· 9.32 mi
7:04/mi
1:05:47
↑ 67↓ 78
146 ft elev
20K· 12.43 mi
7:08/mi
1:27:58
↑ 106↓ 860.1%
165 ft elev
Half· 13.11 mi
7:02/mi
1:32:46
↑ 19↓ 370.5%
148 ft elev
25K· 15.53 mi
7:06/mi
1:49:59
↑ 66↓ 880.2%
127 ft elev
30K· 18.64 mi
7:13/mi
2:12:25
↑ 181↓ 1480.2%
138 ft elev
20M
7:07/mi
2:22:05
↑ 64↓ 500.2%
148 ft elev
21M
7:24/mi
2:29:29
↑ 106↓ 241.6%
227 ft elev
35K· 21.75 mi
7:00/mi
2:34:43
↑ 17↓ 861.7%
156 ft elev
23M
7:10/mi
2:43:41
↑ 23↓ 630.6%
116 ft elev
24M
6:55/mi
2:50:36
↓ 821.3%
34 ft elev
40K· 24.85 mi
6:56/mi
2:56:32
↓ 200.3%
20 ft elev
25.2M
7:15/mi
2:59:02
↑ 13↓ 160.2%
18 ft elev
Finish· 26.22 mi
6:34/mi
3:05:43
↑ 22↓ 21
17 ft elev
Course Elevation
7–469 ft
≈
×2stacked redwood trees
•▲ 890 ft climb · ▼ 1342 ft descent

The Course

Half Splits

1st Half· via Half
1:32:467:05 /mi⚖️ balanced
2nd Half
1:32:577:05 /mi⚖️ balanced
Even split — consistent pacing between halves
Is this your race?

Your race, unpacked

See your splits, ranks & AI insights.

Checkpoint Splits

CheckpointDistanceTime of DayTimeAvg PaceSegment TimeSegment PaceDiff
5K
3.11 mi10:48:0722:067:0722:06
7:07
-
10K
6.21 mi11:09:5043:497:0321:43
6:59
-0:08
15K
9.32 mi11:31:481:05:477:0321:58
7:04
+0:05
20K
12.43 mi11:53:591:27:587:0522:11
7:08
+0:04
Half
13.11 mi11:58:471:32:467:054:48
7:02
-0:06
25K
15.53 mi12:16:001:49:597:0517:13
7:06
+0:04
30K
18.64 mi12:38:262:12:257:0622:26
7:13
+0:07
20M
20.00 mi12:48:062:22:057:069:40
7:07
-0:06
21M
21.00 mi12:55:302:29:297:077:24
7:24
+0:17
35K
21.75 mi13:00:442:34:437:075:14
7:00
-0:24
23M
23.00 mi13:09:422:43:417:078:58
7:10
+0:10
24M
24.00 mi13:16:372:50:367:076:55
6:55
-0:15
40K
24.85 mi13:22:332:56:327:065:56
6:56
+0:01
25.2M
25.20 mi13:25:032:59:027:062:30
7:15
+0:19
Finish
26.22 mi13:31:443:05:437:056:41
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

7:05 /mi

Slowest Pace

7:24 /mi

Loading chart...
Fastest
Middle
Slowest
Average

Segments

Segment Time Comparison

Time at Faster Pace

2:55:49

95% of race

Time at Steady Pace

9:54

5% of race

Time at Slower Pace

0:00

0% of race

Average Pace: 7:05 /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 mi10:48:0722:067:0722:06
7:07
#6966
10K
6.21 mi11:09:5043:497:0321:43
6:59
#6816
15K
9.32 mi11:31:481:05:477:0321:58
7:04
#6831
20K
12.43 mi11:53:591:27:587:0522:11
7:08
#6802
Half
13.11 mi11:58:471:32:467:054:48
7:02
#6804
25K
15.53 mi12:16:001:49:597:0517:13
7:06
#6666
30K
18.64 mi12:38:262:12:257:0622:26
7:13
#6430
20M
20.00 mi12:48:062:22:057:069:40
7:07
#6258
21M
21.00 mi12:55:302:29:297:077:24
7:24
#6113
35K
21.75 mi13:00:442:34:437:075:14
7:00
#6045
23M
23.00 mi13:09:422:43:417:078:58
7:10
#5908
24M
24.00 mi13:16:372:50:367:076:55
6:55
#5783
40K
24.85 mi13:22:332:56:327:065:56
6:56
#5652
25.2M
25.20 mi13:25:032:59:027:062:30
7:15
#5584
Finish
26.22 mi13:31:443:05:437:056:41
6:34
#5413
Faster pace
Steady pace
Slower pace

Checkpoint and Segment Rankings

CheckpointDistanceSeg. DistOverallFemalesF18-39Seg. OverallSeg. FemalesSeg. F18-39
5K3.11 mi3.11 mi69667117116977736736
10K6.21 mi3.10 mi6816+150678+33678+336766690690
15K9.32 mi3.11 mi6831-15696-18696-186977736736
20K12.43 mi3.11 mi6802+29692+4692+46764720720
Half13.11 mi0.68 mi6804-2693-1693-16792689689
25K15.53 mi2.42 mi6666+138679+14679+146126586586
30K18.64 mi3.11 mi6430+236630+49630+495615526526
20M20.00 mi1.36 mi6258+172601+29601+294705401401
21M21.00 mi1.00 mi6113+145582+19582+194149341341
35K21.75 mi0.75 mi6045+68573+9573+95355581581
23M23.00 mi1.25 mi5908+137549+24549+244628448448
24M24.00 mi1.00 mi5783+125533+16533+164284391391
40K24.85 mi0.85 mi5652+131512+21512+213567326326
25.2M25.20 mi0.35 mi5584+68503+9503+92814233233
Finish26.22 mi1.02 mi5413+171475+28475+282803252252

Segment Performance Analysis

10K→15K

0.0 - 3.1 mi

Top 26%
×21story building
+97ft-345ft

Overall

6977

Females

736

F18-39

736

5K→10K

3.1 - 6.2 mi

Top 25%
×5story building
+79ft-138ft

Overall

6766

Females

690

F18-39

690

10K→15K

6.2 - 9.3 mi

Top 26%
×3story building
+67ft-78ft

Overall

6977

Females

736

F18-39

736

15K→20K

9.3 - 12.4 mi

Top 25%
×5story building
+106ft-86ft

Overall

6764

Females

720

F18-39

720

20K→Half

12.4 - 13.1 mi

Top 26%
×2story building
+19ft-37ft

Overall

6792

Females

689

F18-39

689

Half→25K

13.1 - 15.5 mi

Top 23%
×4story building
+66ft-88ft

Overall

6126

Females

586

F18-39

586

25K→30K

15.5 - 18.6 mi

Top 21%
×9story building
+181ft-148ft

Overall

5615

Females

526

F18-39

526

30K→20M

18.6 - 20.0 mi

Top 18%
×5story building
+64ft-50ft

Overall

4705

Females

401

F18-39

401

20M→21M

20.0 - 21.0 mi

Top 16%
×8story building
+106ft-24ft

Overall

4149

Females

341

F18-39

341

21M→35K

21.0 - 21.8 mi

Top 20%
×7story building
+17ft-86ft

Overall

5355

Females

581

F18-39

581

35K→23M

21.8 - 23.0 mi

Top 17%
×5story building
+23ft-63ft

Overall

4628

Females

448

F18-39

448

23M→24M

23.0 - 24.0 mi

Top 16%
×6story building
+12ft-82ft

Overall

4284

Females

391

F18-39

391

24M→40K

24.0 - 24.9 mi

Top 13%
×1story
+6ft-20ft

Overall

3567

Females

326

F18-39

326

40K→25.2M

24.9 - 25.2 mi

Top 11%
×1story
+13ft-16ft

Overall

2814

Females

233

F18-39

233

25.2M→Finish

25.2 - 26.2 mi

Top 11%
×2story building
+22ft-21ft

Overall

2803

Females

252

F18-39

252

Passing Analysis

Category:
Athletes Passed
1994
Passed By
441
Net Change
+1553
SegmentAthletes PassedPassed ByNet ChangeStart RankEnd Rank
Start → 5K----#6966
5K → 10K276126+150#6966#6816
10K → 15K121136-15#6816#6831
15K → 20K11687+29#6831#6802
20K → Half1315-2#6802#6804
Half → 25K15820+138#6804#6666
25K → 30K25216+236#6666#6430
30K → 20M1753+172#6430#6258
20M → 21M1505+145#6258#6113
21M → 35K768+68#6113#6045
35K → 23M14912+137#6045#5908
23M → 24M1305+125#5908#5783
24M → 40K1354+131#5783#5652
40K → 25.2M680+68#5652#5584
25.2M → Finish1754+171#5584#5413
TOTALS1994441+1553

Passing Charts

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